WO2022244648A1 - Device for measuring gas concentration in packaging bag and method for measuring gas concentration in packaging bag - Google Patents

Device for measuring gas concentration in packaging bag and method for measuring gas concentration in packaging bag Download PDF

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Publication number
WO2022244648A1
WO2022244648A1 PCT/JP2022/019762 JP2022019762W WO2022244648A1 WO 2022244648 A1 WO2022244648 A1 WO 2022244648A1 JP 2022019762 W JP2022019762 W JP 2022019762W WO 2022244648 A1 WO2022244648 A1 WO 2022244648A1
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WO
WIPO (PCT)
Prior art keywords
packaging bag
laser
gas concentration
measuring device
tip
Prior art date
Application number
PCT/JP2022/019762
Other languages
French (fr)
Japanese (ja)
Inventor
雅志 大島
祐樹 宮部
Original Assignee
ゼネラルパッカー株式会社
雅志 大島
祐樹 宮部
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Application filed by ゼネラルパッカー株式会社, 雅志 大島, 祐樹 宮部 filed Critical ゼネラルパッカー株式会社
Publication of WO2022244648A1 publication Critical patent/WO2022244648A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/59—Transmissivity

Definitions

  • the present invention relates to a packaging bag gas concentration measuring device and a packaging bag gas concentration measuring method capable of measuring the concentration of a specific gas in a packaging bag.
  • gas replacement packaging is performed to remove residual air from the packaging bag and fill it with an inert gas such as nitrogen or carbon dioxide.
  • an inert gas such as nitrogen or carbon dioxide.
  • the measurement method using this laser gas concentration measuring device utilizes the property that most gas molecules absorb light of a specific wavelength, and measures the number of gas molecules within a certain distance between the front and back surfaces of a packaging bag. It measures concentration.
  • the tip of the laser emitting unit 60 and the tip of the laser receiving unit 61 are moved by a reciprocating mechanism (for example, a cylinder, a servomotor, etc.) 63 for each packaging bag H to be measured. It was necessary to move it to approach the front and back surfaces Ha and Hb of the packaging bag H, and it took time for packaging.
  • a reciprocating mechanism for example, a cylinder, a servomotor, etc.
  • the reciprocating mechanism 63 moves the tip of the laser light emitting unit 60 and the laser light receiving unit of the laser type gas concentration measuring device G3. It was necessary to adjust the separation distance of the tip portion of 61 for each measurement so as to correspond to the thickness of the object (packaging bag) H to be measured.
  • an object of the present invention is to eliminate the need to move the tip of the laser light emitting unit and the tip of the laser light receiving unit by a reciprocating mechanism to approach the front and back surfaces of the packaging bag for each packaging bag to be measured, thereby shortening the packaging time.
  • the gas concentration of the packaging bag can be measured without being affected by the thickness of the packaging bag, and the separation distance between the tip of the laser emitting part and the tip of the laser receiving part can be adjusted according to the thickness of the packaging bag.
  • a gas concentration measuring device for a packaging bag which measures the concentration of a specific gas in a packaging bag filled with an object to be packaged and replaced with gas, and is irradiated with a laser beam of a specific wavelength. and a laser light receiving unit having a receiver for receiving the laser beam oscillated from the transmitter, the tip of the laser generating unit and
  • the gas concentration measuring device for a packaging bag is characterized in that both of the tip portions of the laser light-receiving portion are arranged to face one side of the packaging bag (Claim 1).
  • the tip of the laser generating part and the tip of the laser receiving part have a suction cup part capable of sucking the packaging bag (claim 2). It is preferable that the suction cup portion has a bag guide plate (Claim 3). It is preferable that the suction cup portion is arranged so as to suck the packaging bag from diagonally above the packaging bag arranged vertically in the thickness direction (claim 4). It is preferable that the sucker provided at the tip of the laser generator has a lens that refracts the laser beam emitted from the transmitter and causes the receiver to receive the laser beam (claim 5).
  • the gas concentration measuring device for a packaging bag may have a packaging bag placement section for placing the packaging bag thereon and a placement section reciprocating mechanism for reciprocating the packaging bag placement section.
  • the distal end portion of the laser generating portion and the distal end portion of the laser receiving portion have a guide plate for contacting the bag (claim 7).
  • the distal end surfaces of the laser generating section and the laser receiving section are formed on an inclined surface with the upper side positioned inside and the lower side positioned outside in a front view, and the bag contact guide is inclined on the inclined surface.
  • the gas concentration measuring device has a suction mechanism capable of sucking the packaging bag on at least one of the tip of the laser generating section and the tip of the laser receiving section (claim 9). .
  • the gas concentration measuring device reciprocates the distal end portion of the laser generating portion and the distal end portion of the laser receiving portion inwardly and outwardly with respect to the packaging bag, thereby It is preferable to have a reciprocating mechanism for setting the separation distance between them (Claim 10).
  • the gas concentration measuring device for the packaging bag may have a lifting and lowering reciprocating mechanism for lifting and lowering the tip portion of the laser generating portion and the tip portion of the laser receiving portion (Claim 11).
  • a laser generator having a transmitter for irradiating laser light of a specific wavelength
  • a laser receiver having a receiver for receiving the laser light oscillated from the transmitter.
  • the tip of the laser emitting unit and the tip of the laser receiving unit are moved by the reciprocating mechanism to measure the front and back surfaces of the packaging bag.
  • the gas concentration in the packaging bag can be measured without being affected by the thickness of the packaging bag. There is no need to adjust the separation distance of the tips of the .
  • the gas concentration measuring device for a packaging bag According to the gas concentration measuring device for a packaging bag according to claim 2, it is possible to ensure the close contact between the tip of the laser emitting part and the tip of the laser receiving part and the object to be measured (packaging bag), and the inside of the packaging bag
  • the measurement accuracy can be improved by securing a sufficient detection space for According to the gas concentration measuring device for a packaging bag described in claim 3, a sufficient detection space is ensured in the packaging bag by deforming the packaging bag into a shape along the bag guide plate as the suction cup part sucks. can improve measurement accuracy.
  • the suction cup portion can be brought into closer contact with the object to be measured (packaging bag) in response to the bulging of the packaging bag, and the gas can be sufficiently held within the packaging bag. It is possible to secure a sufficient detection space and improve the measurement accuracy.
  • the laser beam oscillated from the transmitter is refracted to adjust the optical axis with the receiver, and the laser beam is reliably received by the receiver. can be done.
  • the packaging bag in which the objects to be packaged are sequentially measured is attached to the tip of the laser emitting unit and the tip of the laser receiving unit arranged at the set position.
  • the tip of the laser emitting part and the tip of the laser receiving part are provided with a guide for contacting with the bag, so that the tip of the laser emitting part and the laser receiving part are provided. Adhesion between the tip of the part and the object to be measured (packaging bag) can be ensured, and a sufficient detection space can be secured in the packing bag to improve measurement accuracy.
  • the tip surfaces of the laser generating section and the laser receiving section can be brought into close contact with the packaging bag in response to the swelling of the packaging bag, and Sufficient detection space can be secured to improve measurement accuracy.
  • the suction by the suction mechanism ensures the adhesion between the tip of the laser emitting part or the tip of the laser receiving part and the object to be measured (packaging bag). At the same time, it is possible to secure a sufficient detection space in the packaging bag and improve the measurement accuracy.
  • the distance between the tip of the laser generating section and the tip of the laser receiving section can be set according to the packaging bag, and the tip of the laser emitting section can be set. Also, it is possible to ensure better adhesion between the tip of the laser light receiving section and the object to be measured (packaging bag).
  • the tip of the laser generator and the tip of the laser receiver can be brought closer to or separated from the packaging bags that are successively conveyed.
  • the method for measuring the gas concentration of a packaging bag according to claim 12 for each packaging bag to be measured, the tip of the laser emitting unit and the tip of the laser receiving unit are moved by the reciprocating mechanism to measure the front and back surfaces of the packaging bag.
  • the gas concentration in the packaging bag can be measured without being affected by the thickness of the packaging bag. There is no need to adjust the separation distance of the tips of the .
  • FIG. 1 is a schematic front view for explaining an embodiment of a packaging bag gas measuring device of the present invention
  • FIG. 2 is a partially enlarged longitudinal sectional view for explaining the gas measuring device for the packaging bag shown in FIG. 1
  • FIG. 2 is an explanatory diagram for explaining a bag guide of the gas measuring device for the packaging bag shown in FIG. 1, where (a) is a schematic front view, (b) is a left side view, and (c) is a plan view; is.
  • FIG. 4 is a schematic front view for explaining another embodiment of the gas concentration measuring device for packaging bags of the present invention.
  • FIG. 5 is a partial cross-sectional view for explaining a laser light emitting unit and a laser light receiving unit in the gas concentration measuring device for the packaging bag shown in FIG. 4;
  • FIG. 5 is an explanatory diagram for explaining the tip portion of the laser emitting portion and the tip portion of the laser receiving portion in the gas concentration measuring device for the packaging bag shown in FIG. 4, (a) being a front view and (b) being a left side; It is a side view, (c) is a right side view, (d) is a plan view, and (e) is a longitudinal sectional view.
  • 5 is an explanatory diagram for explaining a bag-contacting guide plate in the gas concentration measuring device for a packaging bag shown in FIG.
  • FIG. 5 is a front view for explaining a reciprocating mechanism in the gas concentration measuring device for the packaging bag shown in FIG. 4;
  • FIG. 4 is a schematic front view for explaining another embodiment of the gas concentration measuring device for packaging bags of the present invention.
  • 1 is a front view for explaining a conventional gas concentration measuring device for a packaging bag;
  • FIG. 1 is a front view for explaining a conventional gas concentration measuring device for a packaging bag;
  • both the tip portion of the laser emitting portion and the tip portion of the laser receiving portion are arranged opposite to one side of the packaging bag, so that the tip portion of the laser emitting portion is measured for each packaging bag to be measured. And it is not necessary to move the tip of the laser light receiving part by a reciprocating mechanism to approach the front and back of the packaging bag, which shortens the packaging time and measures the gas concentration of the packaging bag without being affected by the thickness of the packaging bag.
  • a packaging bag gas concentration measuring device and a packaging bag gas concentration measuring method that do not require adjustment of the separation distance between the tip of the laser emitting part and the tip of the laser receiving part according to the thickness of the packaging bag. .
  • FIG. A packaging bag gas concentration measuring device G of this embodiment is a packaging bag gas concentration measuring device for measuring the concentration of a specific gas in a packaging bag H filled with an item S to be packaged, replaced with gas, and packaged.
  • a laser type gas concentration meter comprising a laser generator 2 having a transmitter 1 for irradiating a laser beam of a specific wavelength and a laser receiver 4 having a receiver 3 for receiving the laser beam oscillated from the transmitter 1. 5, and both the tip portion of the laser generating portion 2 and the tip portion of the laser receiving portion 4 are arranged on one side (surface Ha) of the packaging bag H so as to face each other.
  • Each configuration will be described in detail below.
  • the gas concentration measuring apparatus of this embodiment uses a laser type gas densitometer 5 to measure the concentration of oxygen, which is a specific gas, in a packaging bag H packed after gas replacement with an inert gas such as nitrogen or carbon dioxide. It is used as a single measuring device, or installed in the inspection process in various packaging machines such as rotary packaging machines, truck packaging machines, bag making packaging machines, etc. It is used by installing it in the conveyor type inspection process provided in the outline of various packaging machines such as type packaging machines, truck type packaging machines, bag making and packaging machines.
  • the laser type gas concentration meter 5 has a laser generator 2 having a transmitter 1 that emits a laser beam L of a specific wavelength, and receives the laser beam L oscillated from the transmitter 1.
  • the laser generating unit 2 and the laser receiving unit 4 are arranged on both sides of the packaging bag H so as to face each other.
  • the laser type gas concentration meter 5 utilizes infrared absorption spectroscopy using a semiconductor laser as a light source. The gas concentration is indicated by absorbing and measuring this.
  • the laser beam L emitted from the transmitter 1 of the laser generator 2 passes through the lens barrel 8 of the laser generator 2, enters the packaging bag H, and is received by the laser receiver 4. It is configured to be received by the device 3 .
  • the laser light L of a specific wavelength oscillated from the oscillator 1 is selected from the wavelength (natural frequency) range of 760 to 770 nm in the case of oxygen gas.
  • the laser light received by the receiver 3 of the laser light receiving unit 4 absorbs light within the package H based on the absorbance of the laser light. is configured to measure the gas concentration of oxygen gas remaining in the
  • the laser generator 2 has a controller 9 that sets the wavelength of the laser light L emitted from the transmitter 1 to a specific wavelength and adjusts the light intensity to a predetermined level.
  • the control unit 9 adjusts the wavelength of the laser light L output from a semiconductor laser element (not shown) to a specific wavelength unique to the specific gas to be measured so that the laser light L is emitted with a predetermined incident light intensity. to control amplification.
  • the laser light receiving unit 4 has a receiver 3 for receiving the laser light L transmitted through the packaging bag H, and a measuring unit 11 for measuring the gas concentration based on the received light signal from the receiver 3 via the light receiving cable 10. ing.
  • the receiver 3 has an element such as a photodiode (not shown) that converts the transmitted light intensity of the laser light L transmitted through the packaging bag H into an electrical transmitted light signal. As a result, the transmitted light intensity of the laser light L transmitted through the packaging bag H can be electrically processed.
  • a photodiode not shown
  • the measuring unit 11 calculates the transmittance based on the transmitted light signal related to the transmitted light intensity and the incident light signal related to the incident light intensity of the laser light L emitted from the oscillator 1, and measures the laser beam based on the transmittance.
  • the absorbance of light by the specific gas is obtained, and the concentration of the specific gas in the packaging bag H is measured based on the absorbance.
  • both the tip of the laser generating unit 2 and the tip of the laser receiving unit 4 are opposed to one side (surface Ha) of the packaging bag H. are placed.
  • the tip of the laser emitting unit 2 and the tip of the laser receiving unit 4 can be measured for each packaging bag H to be measured. It is not necessary to move the part by a reciprocating mechanism to approach the front and back surfaces (Ha, Hb) of the packaging bag H, so that the packaging time can be shortened, and the gas in the packaging bag H can be released without being affected by the thickness of the packaging bag H.
  • the concentration can be measured, and there is no need to adjust the separation distance between the tip of the laser emitting part 2 and the tip of the laser receiving part 4 corresponding to the thickness of the packaging bag H.
  • the laser generating part 2 and the laser receiving part 4 have suction cup parts 6 and 7 capable of sucking the packaging bag H at their tips, respectively.
  • suction cup parts 6 and 7 capable of sucking the packaging bag H at their tips, respectively.
  • the laser generating unit 2 and the laser receiving unit 4 have suction cups 6 and 7 that can suck the packaging bag H at the tip portions of the lens barrels 8 and 12, respectively. have.
  • These suction cup portions 6 and 7 are connected to communicating passages 15 and 16 having suction holes 13 and 14 provided in lens barrel portions 8 and 12 via flow control valves (not shown) and pressure gauges (not shown).
  • a vacuum source (not shown) such as a vacuum pump is attached to each of them so that they can be sucked.
  • the communicating passages 15 and 16 and the laser paths 17 and 18 communicate with each other, and the suction by the suction cup portions 6 and 7 causes the laser light emitting portion 2 and the laser light receiving portion 4 to move.
  • the insides of the laser paths 17 and 18 are also configured to be in a vacuum atmosphere. As a result, the residual oxygen rate in the laser paths 17 and 18 can be set to approximately 0%, and the measurement accuracy can be further improved.
  • the suction cup portions 6 and 7 are arranged so as to suck the packaging bag H from obliquely above the packaging bag H arranged vertically in the thickness direction.
  • the suction cup portions 6 and 7 can be brought into closer contact with the object to be measured (packaging bag) H in response to the bulge of the packaging bag H, and a sufficient detection space is secured within the packaging bag H for measurement. Accuracy can be improved.
  • the suction cup portions 6 and 7 of this embodiment are provided at positions symmetrical with respect to the center line n in FIG. 3(a). That is, the suction cups 6 and 7 of this embodiment are arranged at the same angle and at the same height with respect to the center line n that extends vertically through the center of the packaging bag H. As shown in FIG. As a result, the measurement distance W of the packaging bag H between the laser emitting unit 2 and the laser receiving unit 4 is maintained constant.
  • the suction cup portion 6 provided at the tip of the laser generating portion 2 has a lens 19 that refracts the laser light L emitted from the transmitter 1 and causes the receiver 3 to receive the light. Thereby, the laser light L oscillated from the transmitter 1 is refracted to adjust the optical axis with the receiver 3 , so that the laser light L can be reliably received by the receiver 3 .
  • the suction cup portions 6 and 7 have bag guide plates 20 and 21, respectively.
  • the packaging bag H is deformed along the bag guide plate 20 by the suction of the suction cups 6 and 7, thereby securing a sufficient detection space in the packaging bag H and improving the measurement accuracy. can.
  • the bag guide plates 20 and 21 of this embodiment are formed of rectangular plate-like bodies, and near the center of the bag guide plates 20 and 21, a circular Through holes 22 and 23 are provided, respectively, and small-diameter portions 24 and 25 provided on the tip side of the suction cup portions 6 and 7 are positioned in the through holes 22 and 23, respectively.
  • Bag guide plates 20 and 21 are attached to the ends of the .
  • the bag guide plates 20 and 21 are arranged to extend in a direction perpendicular to the axial direction of the suction cup portions 6 and 7 or the barrel portions 8 and 12 . As the suction cups 6 and 7 are sucked, the packaging bag H is pulled along the inner side surfaces 20a and 21b of the bag guide plates 20 and 21, thereby ensuring a sufficient detection space within the packaging bag H. is configured as
  • the packaging bag gas concentration measuring device G of this embodiment reciprocates between a packaging bag placing portion 26 on which the packaging bag H is placed and the packaging bag placing portion 26. It has a receiver reciprocating mechanism (for example, a cylinder, a servomotor, etc.) 27 for this purpose.
  • a receiver reciprocating mechanism for example, a cylinder, a servomotor, etc.
  • a packaging bag gas concentration measuring device G1 of this embodiment is a packaging bag gas concentration measuring device for measuring the concentration of a specific gas in a packaging bag H filled with an item S to be packaged, replaced with gas, and packaged.
  • a laser generator 32 having a transmitter 31 for irradiating a laser beam L of a specific wavelength
  • a laser receiver 34 having a receiver 33 for receiving the laser beam L oscillated from the transmitter 31. It has a densitometer 35, and both the tip 36 of the laser generator 32 and the tip 37 of the laser receiver 34 are arranged on one side (surface Ha) of the packaging bag H so as to face each other.
  • the gas concentration measuring device G1 of this embodiment also measures the concentration of oxygen, which is a specific gas, in the packaging bag H packaged after gas replacement with an inert gas such as nitrogen or carbon dioxide, by means of the laser type gas concentration meter 5. It is used as a single measuring device, or installed in the inspection process in various packaging machines such as rotary packaging machines, truck packaging machines, bag making packaging machines, etc. , rotary packaging machines, truck packaging machines, bag-making packaging machines, and other packaging machines.
  • the gas concentration measuring device G1 of this embodiment is installed in a conveyor type inspection process provided in the outline of various packaging machines, and is arranged on a conveyor belt B as shown in FIG. 4 or FIG.
  • This is an apparatus for sequentially measuring the gas concentration of packaging bags H which are packed after gas replacement and which are sequentially conveyed from the front side to the back side.
  • the laser type gas concentration meter 35 includes a laser generator 32 having a transmitter 31 for emitting a laser beam L of a specific wavelength, and a laser receiver 34 having a receiver 33 for receiving the laser beam L oscillated from the transmitter 31. , and the laser generator 32 and the laser receiver 34 are arranged on both sides of the packaging bag H so as to face each other. In this embodiment, the laser generating section 32 and the laser receiving section 34 are arranged on both sides of the conveyor belt B in the width direction.
  • the laser type gas concentration meter 35 utilizes infrared absorption spectroscopy using a semiconductor laser as a light source. It absorbs and measures it to indicate the gas concentration.
  • the laser beam L emitted from the transmitter 31 of the laser generator 32 passes through the tip 36 of the laser generator 32, enters the packaging bag H, and reaches the receiver of the laser receiver 34.
  • 33 is configured to receive the light.
  • the laser light L of a specific wavelength oscillated from the oscillator 31 is selected from the wavelength (natural frequency) range of 760 to 770 nm in the case of oxygen gas.
  • the laser light received by the receiver 33 of the laser light receiving unit 34 absorbs light within the package H based on the absorbance of the laser light. is configured to measure the gas concentration of oxygen gas remaining in the
  • the laser generator 32 has a controller 40 that sets the wavelength of the laser light L emitted from the oscillator 31 to a specific wavelength and adjusts the light intensity to a predetermined level.
  • the control unit 40 adjusts the wavelength of the laser light L output from a semiconductor laser element (not shown) to a specific wavelength specific to the specific gas to be measured so that the laser light L is emitted with a predetermined incident light intensity. to control amplification.
  • the laser light receiving unit 34 has a receiver 33 that receives the laser light L that has passed through the packaging bag H, and a measuring unit 41 that measures the gas concentration based on the received light signal from the receiver 33 .
  • the receiver 33 has an element such as a photodiode (not shown) that converts the transmitted light intensity of the laser light L transmitted through the packaging bag H into an electrical transmitted light signal. As a result, the transmitted light intensity of the laser light L transmitted through the packaging bag H can be electrically processed.
  • a photodiode not shown
  • the measurement unit 41 calculates the transmittance based on the transmitted light signal related to the transmitted light intensity and the incident light signal related to the incident light intensity of the laser light L oscillated from the oscillator 31, and measures the laser beam based on the transmittance.
  • the absorbance of light by the specific gas is obtained, and the concentration of the specific gas in the packaging bag H is measured based on the absorbance.
  • the gas concentration measuring device of the present invention has an adsorption mechanism that can adsorb a packaging bag on at least one of the tip of the laser generator and the tip of the laser receiver.
  • the gas concentration measuring apparatus G1 of this embodiment has suction mechanisms 42 and 43 that can suck the packaging bag H at both the tip portion 36 of the laser generating portion 32 and the tip portion 37 of the laser receiving portion 34. .
  • the adhesion between the tip 36 of the laser generator 32, the tip 37 of the laser receiver 34, and the object to be measured (packaging bag H) can be ensured, and a sufficient detection space can be secured within the packaging bag H. can improve measurement accuracy.
  • the distal end portion 36 of the laser generating portion 32 and the distal end portion 37 of the laser receiving portion 34 are connected to communication paths 46 and 47 having suction holes 44 and 45 as shown in FIGS.
  • Vacuum sources such as vacuum pumps are attached via valves (not shown) and pressure gauges (not shown), and have suction mechanisms 42 and 43 capable of suction.
  • the communication paths 46 and 47 and the laser paths 48 and 49 are communicated with each other, and suction by the adsorption mechanisms 42 and 43 causes the laser light emitting portion 32 and the laser light receiving portion 34 to move.
  • the insides of the laser paths 48 and 49 are also configured to be in a vacuum atmosphere. As a result, the residual oxygen rate in the laser paths 48 and 49 can be set to approximately 0%, and the measurement accuracy can be further improved.
  • the tip end face 50 of the tip end portion 36 of the laser generating portion 32 and the tip end face 51 of the tip end portion 37 of the laser receiving portion 34 face the front face (in FIG. direction), the upper side is positioned on the inner side (packaging bag H side) and the lower side is positioned on the outer side (control section 40 and measurement section 41 side).
  • the leading end surfaces 50 and 51 of the laser generating section 32 and the laser receiving section 34 are brought into close contact with the packaging bag H, corresponding to the bulge of the packaging bag H arranged vertically on the conveyor belt B in the thickness direction.
  • a sufficient detection space can be secured in the packaging bag to improve the measurement accuracy.
  • both the tip 36 of the laser generating unit 32 and the tip 37 of the laser receiving unit 34 are located on one side (surface Ha) of the packaging bag H. is placed opposite to As a result, the gas concentration measurement of the packaging bag H can be performed only on one side (surface Ha) of the packaging bag H. It is not necessary to move the tip part 37 by a reciprocating mechanism to approach the front and back surfaces (Ha, Hb) of the packaging bag H, so that the packaging time can be shortened, and the inside of the packaging bag H is not affected by the thickness of the packaging bag H. , and there is no need to adjust the separation distance between the tip 36 of the laser emitting part 32 and the tip 37 of the laser receiving part 34 corresponding to the thickness of the packaging bag H.
  • a bag contacting guide plate 39 is provided at the tip 36 of the laser generator 32 and the tip 37 of the laser receiver 34, respectively.
  • the adhesion between the tip portion 36 of the laser emitting portion 32 and the tip portion 37 of the laser receiving portion 34 and the object to be measured (packaging bag) H is secured, and a sufficient detection space is secured within the packaging bag H. can be used to improve measurement accuracy. That is, by deforming the packaging bag H along the bag-contacting guide plate 39 with the suction by the suction mechanisms 42 and 43, a sufficient detection space is secured in the packaging bag H to improve the measurement accuracy. be able to.
  • the guide plate 39 for contacting with the bag of this embodiment has a tip end face 50 of the tip end portion 36 of the laser generating portion 32 and a tip end face 50 of the laser light receiving portion 34 formed on an inclined plane. They are arranged on the inner side of the tip surface 51 of the tip portion 37 (on the side of the packaging bag H) so as to be inclined.
  • the guide plate 39 for contacting with the bag is formed of a bent plate-like body, and has a front end surface 50 of the front end portion 36 of the laser generating portion 32 and a front end portion 37 of the laser light receiving portion 34.
  • a bag contacting guide plate 39 is fixed to the outer rear portion of the tip portion 36 of the laser generating portion 32 and the tip portion 37 of the laser receiving portion 34, respectively.
  • the reciprocating mechanism 38 is a mechanism for reciprocating the distal end portion 36 of the laser generating portion 32 and the distal end portion 37 of the laser receiving portion 34 in and out of the packaging bag H.
  • the separation distance between the tip of the laser generating section 32 and the tip of the laser receiving section 34 can be set to a constant distance according to the size of the packaging bag H, and the tip of the laser emitting section 32 and the tip of the laser receiving section 34 can be set at a constant distance. and the object to be measured (packaging bag) can be ensured.
  • the reciprocating mechanism 38 of this embodiment includes a first reciprocating portion 38a to which the laser generating portion 32 is fixed and a second reciprocating portion 38b to which the laser light receiving portion 34 is fixed. , a feed screw mechanism 38c in which a first reciprocating part 38a and a second reciprocating part 38b are attached so as to be reciprocable, and an operation part 38d for operating the feed screw mechanism 38c.
  • the laser generating section 32 and the laser receiving section 34 are relatively moved inwards and outwards, so that the distance between the tip of the laser generating section 32 and the tip of the laser receiving section 34 can be set.
  • the operation portion 38d is manually operated, but the operation portion 38d is not limited to this.
  • the scope of the present invention also includes a reciprocating mechanism that can be set to approach and separate from.
  • the laser generating section and the laser receiving section are configured to be movable in and out of the packaging bag H by a cylinder, a servomotor, or the like.
  • the packaging bag gas concentration measuring device G2 of this embodiment includes the tip portion 36 of the laser generating section 32 and the The difference is that it has an elevating reciprocating mechanism (for example, a cylinder, a servomotor, etc.) for elevating the tip 37 of the laser light receiving section 34 .
  • an elevating reciprocating mechanism for example, a cylinder, a servomotor, etc.
  • the gas concentration measuring method for packaging bags of the present invention is a gas concentration measuring method commonly used in the gas concentration measuring devices G, G1, and G2 for packaging bags described above. Then, as shown in FIG. 1, a laser generator 2 having a transmitter 1 for emitting a laser beam L of a specific wavelength and a laser receiver 3 having a receiver 3 for receiving the laser beam L oscillated from the transmitter 1 Package for measuring the concentration of a specific gas in a packaging bag H filled with a package S and gas replacement using a packaging bag gas concentration measuring device having a laser type gas concentration meter 5 equipped with 4.
  • a method for measuring the gas concentration of a bag in which the tip of the laser generating unit 2 and the tip of the laser receiving unit 4 are placed facing each other on one side (Hb) of the packaging bag H to measure the gas concentration. It is a concentration measurement method. As a result, it is not necessary to move the tip of the laser emitting portion and the tip of the laser receiving portion by the reciprocating mechanism to approach the front and back surfaces of the packaging bag for each packaging bag to be measured, and the packaging time can be shortened.
  • the gas concentration of the packaging bag can be measured without being influenced by the thickness of the bag, and there is no need to adjust the distance between the tip of the laser emitting part and the tip of the laser receiving part corresponding to the thickness of the packaging bag.
  • G, G1, G2 Packaging bag gas concentration measuring device S Object to be packaged H Packaging bag Ha Front surface Hb Back surface 1 Transmitter 2 Laser generating unit 3 Receiver 4 Laser light receiving unit 5 Laser type gas concentration meter 6, 7 Suction cup unit 8 Mirror Cylindrical part 9 Control part 10 Light receiving cable 11 Measuring part 12 Lens barrel parts 13, 14 Suction holes 15, 16 Communication path 18 Laser path 19 Lenses 20, 21 Bag guide plates 20a, 21a Inner surfaces 22, 23 Through holes 24, 25 Thin Radial portion 26 Packaging bag mounting portion 27 Mounting portion reciprocating mechanism 31 Transmitter 32 Laser generating portion 33 Receiver 34 Laser receiving portion 35 Laser gas densitometer 36 Tip portion 37 of laser generating portion Tip portion 38 of laser receiving portion Reciprocating mechanism 39 Bag contact guide plate 39a Slanted surface portion 39b Fixing bent portion 39c Through hole 40 for laser light passage Control portion 41 Measurement portions 42, 43 Suction mechanisms 44, 45 Suction holes 46, 47 Communication passages 48, 49 Laser Paths 50, 51 Tip surface 55 Lifting reciprocating mechanism

Abstract

[Problem] To provide a device for measuring the gas concentration in a packaging bag and a method for measuring the gas concentration in a packaging bag with which: it is no longer necessary to move, for every packaging bag to be measured, the tip part of a laser emission unit and the tip part of a laser reception unit by means of a reciprocating motion mechanism towards the obverse and reverse surfaces of the packaging bag, making it possible to reduce the packaging time; and it is possible to measure the gas concentration of the packaging bag without being influenced by the thickness of the packaging bag, without the need to adjust the separation distance between the tip part of the laser emission unit and the tip part of the laser reception unit in accordance with the thickness of the packaging bag. [Solution] In this device G for measuring the gas concentration of a packaging bag, both the tip part of a laser generation unit 2 and the tip part of a laser reception unit 4 are disposed, so as to face each other, on the side of one of the surfaces (e.g., surface Ha) of a packaging bag H.

Description

包装袋のガス濃度測定装置および包装袋のガス濃度測定方法Packaging bag gas concentration measuring device and packaging bag gas concentration measuring method
　本発明は、包装袋内の特定ガスの濃度を測定することができる包装袋のガス濃度測定装置および包装袋のガス濃度測定方法に関する。 The present invention relates to a packaging bag gas concentration measuring device and a packaging bag gas concentration measuring method capable of measuring the concentration of a specific gas in a packaging bag.
　被包装物が特に食品の場合、保存期間や賞味期限を長くするために、包装時に包装袋内に残留する空気を排除して窒素、二酸化炭素等の不活性ガスを充填するガス置換包装が行われている。例えば特許文献１には、包装袋内に被包装物を投入すると共に、包装袋に挿入したノズルから不活性ガスを充填して、不活性ガスと包装袋内の酸素との置換作用を行なう不活性ガス充填方法が開示されている。 Especially when the items to be packaged are foods, in order to extend the shelf life and expiration date, gas replacement packaging is performed to remove residual air from the packaging bag and fill it with an inert gas such as nitrogen or carbon dioxide. It is For example, in Patent Document 1, an inert gas is filled from a nozzle inserted into a packaging bag while an object to be packaged is put into the packaging bag, so that the inert gas replaces oxygen in the packaging bag. An active gas filling method is disclosed.
　そして、製品検査において、被包装物を包装した包装袋内に残存する酸素濃度を計測する方法として、本件出願人が、例えば特許文献２にレーザー式ガス濃度測定装置による計測方法を提案している。 As a method for measuring the concentration of oxygen remaining in a packaging bag in which an object to be packaged is packed in a product inspection, the applicant of the present application has proposed a measurement method using a laser gas concentration measuring device, for example, in Patent Document 2. .
　このレーザー式ガス濃度測定装置による計測方法は、大半のガス分子が特定波長の光を吸収するという性質を利用して、包装袋の表裏面間の一定距離内のガス分子の数を計測しガス濃度を測定するものである。 The measurement method using this laser gas concentration measuring device utilizes the property that most gas molecules absorb light of a specific wavelength, and measures the number of gas molecules within a certain distance between the front and back surfaces of a packaging bag. It measures concentration.
　そのため、図１０または図１１に示すように、測定する包装袋Ｈ毎に、レーザー発光部６０の先端部およびレーザー受光部６１の先端部を、往復動機構（例えばシリンダーやサーボモーター等）６３により移動させて包装袋Ｈの表裏面Ｈａ，Ｈｂに接近させることが必要でありその分包装時間を要した。 Therefore, as shown in FIG. 10 or 11, the tip of the laser emitting unit 60 and the tip of the laser receiving unit 61 are moved by a reciprocating mechanism (for example, a cylinder, a servomotor, etc.) 63 for each packaging bag H to be measured. It was necessary to move it to approach the front and back surfaces Ha and Hb of the packaging bag H, and it took time for packaging.
　また、測定する包装袋Ｈの厚み（表面Ｈａと裏面Ｈｂ間の離隔距離）が異なる場合は、往復動機構６３により、レーザー式ガス濃度測定装置Ｇ３のレーザー発光部６０の先端部とレーザー受光部６１の先端部の離隔距離を被測定物（包装袋）Ｈの厚みに対応させるべく測定毎に調整する必要があった。 When the thickness of the packaging bag H to be measured (separation distance between the front surface Ha and the rear surface Hb) is different, the reciprocating mechanism 63 moves the tip of the laser light emitting unit 60 and the laser light receiving unit of the laser type gas concentration measuring device G3. It was necessary to adjust the separation distance of the tip portion of 61 for each measurement so as to correspond to the thickness of the object (packaging bag) H to be measured.
特許第３７４２０４２号公報Japanese Patent No. 3742042 特許第５１２４７１９号公報Japanese Patent No. 5124719
　そこで、本発明の課題は、測定する包装袋毎に、レーザー発光部の先端部およびレーザー受光部の先端部を往復動機構により移動させて包装袋の表裏面に接近させる必要がなく包装時間を短縮できると共に、包装袋の厚みに左右されることなく包装袋のガス濃度を測定でき、包装袋の厚みに対応させてレーザー発光部の先端部とレーザー受光部の先端部の離隔距離を調整する必要もない包装袋のガス濃度測定装置および包装袋のガス濃度測定方法を提供することにある。 Therefore, an object of the present invention is to eliminate the need to move the tip of the laser light emitting unit and the tip of the laser light receiving unit by a reciprocating mechanism to approach the front and back surfaces of the packaging bag for each packaging bag to be measured, thereby shortening the packaging time. In addition to being able to shorten, the gas concentration of the packaging bag can be measured without being affected by the thickness of the packaging bag, and the separation distance between the tip of the laser emitting part and the tip of the laser receiving part can be adjusted according to the thickness of the packaging bag. To provide an unnecessary packaging bag gas concentration measuring device and packaging bag gas concentration measuring method.
　上記課題を解決するものは、被包装物を充填しガス置換して包装された包装袋内の特定ガスの濃度を測定する包装袋のガス濃度測定装置であって、特定波長のレーザー光を照射する発信器を有するレーザー発生部と、前記発信器から発振されるレーザー光を受光する受信器を有するレーザー受光部とを備えたレーザー式ガス濃度計を有し、前記レーザー発生部の先端部と前記レーザー受光部の先端部のいずれもが、前記包装袋の片面側に対向配置されていることを特徴とする包装袋のガス濃度測定装置である（請求項１）。 To solve the above problems, there is provided a gas concentration measuring device for a packaging bag which measures the concentration of a specific gas in a packaging bag filled with an object to be packaged and replaced with gas, and is irradiated with a laser beam of a specific wavelength. and a laser light receiving unit having a receiver for receiving the laser beam oscillated from the transmitter, the tip of the laser generating unit and The gas concentration measuring device for a packaging bag is characterized in that both of the tip portions of the laser light-receiving portion are arranged to face one side of the packaging bag (Claim 1).
　前記レーザー発生部の先端部および前記レーザー受光部の先端部は、前記包装袋を吸着可能な吸盤部を有していることが好ましい（請求項２）。前記吸盤部は、袋ガイド板を有していることが好ましい（請求項３）。前記吸盤部は、厚さ方向を上下に配置された前記包装袋に対して斜め上方から前記包装袋を吸引するように配されていることが好ましい（請求項４）。前記レーザー発生部の先端に設けられた吸盤部は、前記発信器から発振されるレーザー光を屈折させて前記受信器に受光させるレンズを有していることが好ましい（請求項５）。前記包装袋のガス濃度測定装置は、前記包装袋を載置するための包装袋載置部と、前記包装袋載置部を往復動するための載置部往復動機構を有していてもよい（請求項６）。前記レーザー発生部の先端部および前記レーザー受光部の先端部は、袋当接用ガイド板を有していることが好ましい（請求項７）。前記レーザー発生部および前記レーザー受光部の先端面は、正面視において上側が内側に位置し下側が外側に位置する傾斜面に形成され、該傾斜面に前記袋当接用ガイドが傾斜して配されていることが好ましい（請求項８）。前記ガス濃度測定装置は、前記レーザー発生部の先端部と前記レーザー受光部の先端部の少なくとも一方に、前記包装袋を吸着可能とする吸着機構を有していることが好ましい（請求項９）。前記ガス濃度測定装置は、前記レーザー発生部の先端部および前記レーザー受光部の先端部を前記包装袋に対して内外に往復動させて前記レーザー発生部の先端部と前記レーザー受光部の先端部間の離隔距離を設定するための往復動機構を有していることが好ましい（請求項１０）。前記包装袋のガス濃度測定装置は、前記レーザー発生部の先端部と前記レーザー受光部の先端部を昇降させるための昇降用往復動機構を有していてもよい（請求項１１）。 It is preferable that the tip of the laser generating part and the tip of the laser receiving part have a suction cup part capable of sucking the packaging bag (claim 2). It is preferable that the suction cup portion has a bag guide plate (Claim 3). It is preferable that the suction cup portion is arranged so as to suck the packaging bag from diagonally above the packaging bag arranged vertically in the thickness direction (claim 4). It is preferable that the sucker provided at the tip of the laser generator has a lens that refracts the laser beam emitted from the transmitter and causes the receiver to receive the laser beam (claim 5). The gas concentration measuring device for a packaging bag may have a packaging bag placement section for placing the packaging bag thereon and a placement section reciprocating mechanism for reciprocating the packaging bag placement section. Good (Claim 6). It is preferable that the distal end portion of the laser generating portion and the distal end portion of the laser receiving portion have a guide plate for contacting the bag (claim 7). The distal end surfaces of the laser generating section and the laser receiving section are formed on an inclined surface with the upper side positioned inside and the lower side positioned outside in a front view, and the bag contact guide is inclined on the inclined surface. It is preferable (claim 8). It is preferable that the gas concentration measuring device has a suction mechanism capable of sucking the packaging bag on at least one of the tip of the laser generating section and the tip of the laser receiving section (claim 9). . The gas concentration measuring device reciprocates the distal end portion of the laser generating portion and the distal end portion of the laser receiving portion inwardly and outwardly with respect to the packaging bag, thereby It is preferable to have a reciprocating mechanism for setting the separation distance between them (Claim 10). The gas concentration measuring device for the packaging bag may have a lifting and lowering reciprocating mechanism for lifting and lowering the tip portion of the laser generating portion and the tip portion of the laser receiving portion (Claim 11).
　また、上記課題を解決するものは、特定波長のレーザー光を照射する発信器を有するレーザー発生部と、前記発信器から発振されるレーザー光を受光する受信器を有するレーザー受光部とを備えたレーザー式ガス濃度計を有する包装袋のガス濃度測定装置を用いて被包装物を充填しガス置換して包装された包装袋内の特定ガスの濃度を測定する包装袋のガス濃度測定方法であって、前記レーザー発生部の先端部および前記レーザー受光部の先端部を、前記包装袋の片面側に対向配置させてガス濃度を測定することを特徴とする包装袋のガス濃度測定方法である（請求項１２）。 Further, the object to solve the above problems is provided with a laser generator having a transmitter for irradiating laser light of a specific wavelength, and a laser receiver having a receiver for receiving the laser light oscillated from the transmitter. A method for measuring the concentration of a specific gas in a packaging bag filled with an object to be packaged and replaced with gas using a packaging bag gas concentration measuring device having a laser type gas concentration meter. A method for measuring the gas concentration of a packaging bag, wherein the tip of the laser generating unit and the tip of the laser receiving unit are arranged opposite to one side of the packaging bag to measure the gas concentration ( Claim 12).
　請求項１に記載の包装袋のガス濃度測定装置によれば、測定する包装袋毎に、レーザー発光部の先端部およびレーザー受光部の先端部を往復動機構により移動させて包装袋の表裏面に接近させる必要がなく包装時間を短縮できると共に、包装袋の厚みに左右されることなく包装袋のガス濃度を測定でき、包装袋の厚みに対応させてレーザー発光部の先端部とレーザー受光部の先端部の離隔距離を調整する必要もない。
　請求項２に記載の包装袋のガス濃度測定装置によれば、レーザー発光部の先端部やレーザー受光部の先端部と被測定物（包装袋）との密着性を確保できると共に、包装袋内に十分な検知空間を確保して測定精度を向上させることができる。
　請求項３に記載の包装袋のガス濃度測定装置によれば、吸盤部の吸引に伴って袋ガイド板に沿った形状に包装袋を変形させることで包装袋内に十分な検知空間を確保して測定精度を向上させることができる。
　請求項４に記載の包装袋のガス濃度測定装置によれば、包装袋の膨らみに対応して、吸盤部をより被測定物（包装袋）に密着させることができると共に、包装袋内に十分な検知空間を確保して測定精度を向上させることができる。
　請求項５に記載の包装袋のガス濃度測定装置によれば、発信器から発振されるレーザー光を屈折させて受信器との光軸を調整し、レーザー光を受信器に確実に受光させることができる。
　請求項６に記載の包装袋のガス濃度測定装置によれば、順次測定する被包装物を包装した包装袋を、設定位置に配置されたレーザー発光部の先端部とレーザー受光部の先端部に接近または離隔させることができる。
　請求項７に記載の包装袋のガス濃度測定装置によれば、レーザー発光部の先端部およびレーザー受光部の先端部に袋当接用ガイドが設けられることで、レーザー発光部の先端やレーザー受光部の先端と被測定物（包装袋）との密着性が確保されると共に、包装袋内に十分な検知空間を確保して測定精度を向上させることができる。
　請求項８に記載の包装袋のガス濃度測定装置によれば、包装袋の膨らみに対応してレーザー発生部およびレーザー受光部の先端面を包装袋に密着させることができると共に、包装袋内に十分な検知空間を確保して測定精度を向上させることができる。
　請求項９に記載の包装袋のガス濃度測定装置によれば、吸着機構による吸引によって、レーザー発光部の先端やレーザー受光部の先端と被測定物（包装袋）との密着性が確保されると共に、包装袋内に十分な検知空間を確保して測定精度を向上させることができる。
　請求項１０に記載の包装袋のガス濃度測定装置によれば、包装袋に応じてレーザー発生部の先端部およびレーザー受光部の先端部の間隔を設定することができ、レーザー発光部の先端部やレーザー受光部の先端部と被測定物（包装袋）との密着性をより確保できる。
　請求項１１に記載の包装袋のガス濃度測定装置によれば、順次搬送されて来る包装袋に対して、レーザー発生部の先端部およびレーザー受光部の先端部を接近または離隔させることができる。
　請求項１２に記載の包装袋のガス濃度測定方法によれば、測定する包装袋毎に、レーザー発光部の先端部およびレーザー受光部の先端部を往復動機構により移動させて包装袋の表裏面に接近させる必要がなく包装時間を短縮できると共に、包装袋の厚みに左右されることなく包装袋のガス濃度を測定でき、包装袋の厚みに対応させてレーザー発光部の先端部とレーザー受光部の先端部の離隔距離を調整する必要もない。 According to the gas concentration measuring device for packaging bags described in claim 1, for each packaging bag to be measured, the tip of the laser emitting unit and the tip of the laser receiving unit are moved by the reciprocating mechanism to measure the front and back surfaces of the packaging bag. In addition to shortening the packaging time without having to approach the , the gas concentration in the packaging bag can be measured without being affected by the thickness of the packaging bag. There is no need to adjust the separation distance of the tips of the .
According to the gas concentration measuring device for a packaging bag according to claim 2, it is possible to ensure the close contact between the tip of the laser emitting part and the tip of the laser receiving part and the object to be measured (packaging bag), and the inside of the packaging bag The measurement accuracy can be improved by securing a sufficient detection space for
According to the gas concentration measuring device for a packaging bag described in claim 3, a sufficient detection space is ensured in the packaging bag by deforming the packaging bag into a shape along the bag guide plate as the suction cup part sucks. can improve measurement accuracy.
According to the gas concentration measuring device for a packaging bag according to claim 4, the suction cup portion can be brought into closer contact with the object to be measured (packaging bag) in response to the bulging of the packaging bag, and the gas can be sufficiently held within the packaging bag. It is possible to secure a sufficient detection space and improve the measurement accuracy.
According to the gas concentration measuring device for packaging bags according to claim 5, the laser beam oscillated from the transmitter is refracted to adjust the optical axis with the receiver, and the laser beam is reliably received by the receiver. can be done.
According to the gas concentration measuring device for a packaging bag described in claim 6, the packaging bag in which the objects to be packaged are sequentially measured is attached to the tip of the laser emitting unit and the tip of the laser receiving unit arranged at the set position. Can be brought closer or further apart.
According to the gas concentration measuring device for a packaging bag according to claim 7, the tip of the laser emitting part and the tip of the laser receiving part are provided with a guide for contacting with the bag, so that the tip of the laser emitting part and the laser receiving part are provided. Adhesion between the tip of the part and the object to be measured (packaging bag) can be ensured, and a sufficient detection space can be secured in the packing bag to improve measurement accuracy.
According to the gas concentration measuring device for a packaging bag according to claim 8, the tip surfaces of the laser generating section and the laser receiving section can be brought into close contact with the packaging bag in response to the swelling of the packaging bag, and Sufficient detection space can be secured to improve measurement accuracy.
According to the gas concentration measuring device for a packaging bag according to claim 9, the suction by the suction mechanism ensures the adhesion between the tip of the laser emitting part or the tip of the laser receiving part and the object to be measured (packaging bag). At the same time, it is possible to secure a sufficient detection space in the packaging bag and improve the measurement accuracy.
According to the gas concentration measuring device for a packaging bag according to claim 10, the distance between the tip of the laser generating section and the tip of the laser receiving section can be set according to the packaging bag, and the tip of the laser emitting section can be set. Also, it is possible to ensure better adhesion between the tip of the laser light receiving section and the object to be measured (packaging bag).
According to the gas concentration measuring device for packaging bags of the eleventh aspect, the tip of the laser generator and the tip of the laser receiver can be brought closer to or separated from the packaging bags that are successively conveyed.
According to the method for measuring the gas concentration of a packaging bag according to claim 12, for each packaging bag to be measured, the tip of the laser emitting unit and the tip of the laser receiving unit are moved by the reciprocating mechanism to measure the front and back surfaces of the packaging bag. In addition to shortening the packaging time without having to approach the , the gas concentration in the packaging bag can be measured without being affected by the thickness of the packaging bag. There is no need to adjust the separation distance of the tips of the .
本発明の包装袋のガス測定装置の一実施例を説明するための正面概略図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view for explaining an embodiment of a packaging bag gas measuring device of the present invention; 図１に示した包装袋のガス測定装置を説明するための部分拡大縦断面図である。FIG. 2 is a partially enlarged longitudinal sectional view for explaining the gas measuring device for the packaging bag shown in FIG. 1; 図１に示した包装袋のガス測定装置の袋ガイドを説明するための説明図であり、（ａ）は正面概略図であり、（ｂ）は左側面図であり、（ｃ）は平面図である。FIG. 2 is an explanatory diagram for explaining a bag guide of the gas measuring device for the packaging bag shown in FIG. 1, where (a) is a schematic front view, (b) is a left side view, and (c) is a plan view; is. 本発明の包装袋のガス濃度測定装置の他の実施例を説明するための正面概略図である。FIG. 4 is a schematic front view for explaining another embodiment of the gas concentration measuring device for packaging bags of the present invention. 図４に示した包装袋のガス濃度測定装置におけるレーザー発光部およびレーザー受光部を説明するための一部断面図である。FIG. 5 is a partial cross-sectional view for explaining a laser light emitting unit and a laser light receiving unit in the gas concentration measuring device for the packaging bag shown in FIG. 4; 図４に示した包装袋のガス濃度測定装置におけるレーザー発光部の先端部およびレーザー受光部の先端部を説明するための説明図であり、（ａ）は正面図であり、（ｂ）は左側面図であり、（ｃ）は右側面図であり、（ｄ）は平面図であり、（ｅ）は縦断面図である。FIG. 5 is an explanatory diagram for explaining the tip portion of the laser emitting portion and the tip portion of the laser receiving portion in the gas concentration measuring device for the packaging bag shown in FIG. 4, (a) being a front view and (b) being a left side; It is a side view, (c) is a right side view, (d) is a plan view, and (e) is a longitudinal sectional view. 図４に示した包装袋のガス濃度測定装置における袋当接用ガイド板を説明するための説明図であり、（ａ）は正面図であり、（ｂ）は左側面図であり、（ｃ）は平面図である。5 is an explanatory diagram for explaining a bag-contacting guide plate in the gas concentration measuring device for a packaging bag shown in FIG. 4, (a) being a front view, (b) being a left side view, and (c) ) is a plan view. 図４に示した包装袋のガス濃度測定装置における往復動機構を説明するための正面図である。FIG. 5 is a front view for explaining a reciprocating mechanism in the gas concentration measuring device for the packaging bag shown in FIG. 4; 本発明の包装袋のガス濃度測定装置の他の実施例を説明するための正面概略図である。FIG. 4 is a schematic front view for explaining another embodiment of the gas concentration measuring device for packaging bags of the present invention. 従来の包装袋のガス濃度測定装置を説明するための正面図である。1 is a front view for explaining a conventional gas concentration measuring device for a packaging bag; FIG. 従来の包装袋のガス濃度測定装置を説明するための正面図である。1 is a front view for explaining a conventional gas concentration measuring device for a packaging bag; FIG.
　本発明では、レーザー発生部の先端部とレーザー受光部の先端部のいずれもが、前記包装袋の片面側に対向配置されていることで、測定する包装袋毎に、レーザー発光部の先端部およびレーザー受光部の先端部を往復動機構により移動させて包装袋の表裏面に接近させる必要がなく包装時間を短縮できると共に、包装袋の厚みに左右されることなく包装袋のガス濃度を測定でき、包装袋の厚みに対応させてレーザー発光部の先端部とレーザー受光部の先端部の離隔距離を調整する必要もない包装袋のガス濃度測定装置および包装袋のガス濃度測定方法を実現した。 In the present invention, both the tip portion of the laser emitting portion and the tip portion of the laser receiving portion are arranged opposite to one side of the packaging bag, so that the tip portion of the laser emitting portion is measured for each packaging bag to be measured. And it is not necessary to move the tip of the laser light receiving part by a reciprocating mechanism to approach the front and back of the packaging bag, which shortens the packaging time and measures the gas concentration of the packaging bag without being affected by the thickness of the packaging bag. A packaging bag gas concentration measuring device and a packaging bag gas concentration measuring method that do not require adjustment of the separation distance between the tip of the laser emitting part and the tip of the laser receiving part according to the thickness of the packaging bag. .
　本発明の包装袋のガス濃度測定装置を図１ないし図３に示した一実施例を用いて説明する。
　この実施例の包装袋のガス濃度測定装置Ｇは、被包装物Ｓを充填しガス置換して包装された包装袋Ｈ内の特定ガスの濃度を測定する包装袋のガス濃度測定装置であって、特定波長のレーザー光を照射する発信器１を有するレーザー発生部２と、発信器１から発振されるレーザー光を受光する受信器３を有するレーザー受光部４とを備えたレーザー式ガス濃度計５を有し、レーザー発生部２の先端部とレーザー受光部４の先端部のいずれもが、包装袋Ｈの片面（表面Ｈａ）側に対向配置されている。以下、各構成について順次詳述する。 A gas concentration measuring device for packaging bags according to the present invention will be described with reference to an embodiment shown in FIGS. 1 to 3. FIG.
A packaging bag gas concentration measuring device G of this embodiment is a packaging bag gas concentration measuring device for measuring the concentration of a specific gas in a packaging bag H filled with an item S to be packaged, replaced with gas, and packaged. A laser type gas concentration meter comprising a laser generator 2 having a transmitter 1 for irradiating a laser beam of a specific wavelength and a laser receiver 4 having a receiver 3 for receiving the laser beam oscillated from the transmitter 1. 5, and both the tip portion of the laser generating portion 2 and the tip portion of the laser receiving portion 4 are arranged on one side (surface Ha) of the packaging bag H so as to face each other. Each configuration will be described in detail below.
　この実施例のガス濃度測定装置被包装物Ｇは、窒素、二酸化炭素等の不活性ガスによりガス置換をして包装された包装袋Ｈ内の特定ガスである酸素濃度をレーザー式ガス濃度計５によって測定するものであり、単独の測定装置として使用され、または、ロータリー式包装機、トラック式包装機、製袋包装機等の各種包装機内の検査工程に設置して使用され、さらには、ロータリー式包装機、トラック式包装機、製袋包装機等の各種包装機のアウトラインに設けられたコンベア式検査工程に設置して使用される。 The gas concentration measuring apparatus of this embodiment uses a laser type gas densitometer 5 to measure the concentration of oxygen, which is a specific gas, in a packaging bag H packed after gas replacement with an inert gas such as nitrogen or carbon dioxide. It is used as a single measuring device, or installed in the inspection process in various packaging machines such as rotary packaging machines, truck packaging machines, bag making packaging machines, etc. It is used by installing it in the conveyor type inspection process provided in the outline of various packaging machines such as type packaging machines, truck type packaging machines, bag making and packaging machines.
　レーザー式ガス濃度計５は、図１または図２に示すように、特定波長のレーザー光Ｌを照射する発信器１を有するレーザー発生部２と、発信器１から発振されるレーザー光Ｌを受光する受信器３を有するレーザー受光部４とを備えており、レーザー発生部２とレーザー受光部４とが包装袋Ｈの両側に対向して配されるように構成されている。 As shown in FIG. 1 or FIG. 2, the laser type gas concentration meter 5 has a laser generator 2 having a transmitter 1 that emits a laser beam L of a specific wavelength, and receives the laser beam L oscillated from the transmitter 1. The laser generating unit 2 and the laser receiving unit 4 are arranged on both sides of the packaging bag H so as to face each other.
　レーザー式ガス濃度計５は、半導体レーザーを光源とする赤外線吸収分光法を利用するもので、測定対象の分子（測定ガス：この実施例では酸素ガス）に固有周波数の光を与えると光エネルギーを吸収し、これを測定することによりガス濃度の表示を行なうものである。 The laser type gas concentration meter 5 utilizes infrared absorption spectroscopy using a semiconductor laser as a light source. The gas concentration is indicated by absorbing and measuring this.
　具体的には、レーザー発生部２の発信器１から発振されるレーザー光Ｌは、レーザー発生部２の鏡筒部８内を通過して包装袋Ｈ内に侵入し、レーザー受光部４の受信器３に受光されるように構成されている。発信器１から発振される特定波長のレーザー光Ｌは、酸素ガスの場合、波長（固有周波数）７６０～７７０ｎｍの範囲から選択される。そして、特定波長のレーザー光Ｌが、包装袋Ｈ内に残留している酸素ガスによって吸収されると、レーザー受光部４の受信器３に受光されたレーザー光の吸光度に基づいて包装体Ｈ内に残留している酸素ガスのガス濃度が測定されるように構成されている。 Specifically, the laser beam L emitted from the transmitter 1 of the laser generator 2 passes through the lens barrel 8 of the laser generator 2, enters the packaging bag H, and is received by the laser receiver 4. It is configured to be received by the device 3 . The laser light L of a specific wavelength oscillated from the oscillator 1 is selected from the wavelength (natural frequency) range of 760 to 770 nm in the case of oxygen gas. Then, when the laser light L of the specific wavelength is absorbed by the oxygen gas remaining in the packaging bag H, the laser light received by the receiver 3 of the laser light receiving unit 4 absorbs light within the package H based on the absorbance of the laser light. is configured to measure the gas concentration of oxygen gas remaining in the
　レーザー発生部２は、発信器１から発振されるレーザー光Ｌの波長を特定の波長に設定し、所定の光強度に調整する制御部９を有している。制御部９は、半導体レーザー素子（図示しない）から出力されるレーザー光Ｌの波長を測定対象の特定ガス固有の特定波長に調整して、レーザー光Ｌが所定の入射光強度で射出されるように増幅制御する。 The laser generator 2 has a controller 9 that sets the wavelength of the laser light L emitted from the transmitter 1 to a specific wavelength and adjusts the light intensity to a predetermined level. The control unit 9 adjusts the wavelength of the laser light L output from a semiconductor laser element (not shown) to a specific wavelength unique to the specific gas to be measured so that the laser light L is emitted with a predetermined incident light intensity. to control amplification.
　レーザー受光部４は、包装袋Ｈを透過したレーザー光Ｌを受光する受信器３と、受信器３からの受光ケーブル１０を介する受光信号に基づいてガス濃度を測定する測定部１１とを有している。 The laser light receiving unit 4 has a receiver 3 for receiving the laser light L transmitted through the packaging bag H, and a measuring unit 11 for measuring the gas concentration based on the received light signal from the receiver 3 via the light receiving cable 10. ing.
　受信器３は、包装袋Ｈを透過したレーザー光Ｌの透過光強度を電気的な透過光信号に変換する素子、例えばフォトダイオード（図示略）を有している。これによって、包装袋Ｈを透過したレーザー光Ｌの透過光強度を電気的に処理することができる。 The receiver 3 has an element such as a photodiode (not shown) that converts the transmitted light intensity of the laser light L transmitted through the packaging bag H into an electrical transmitted light signal. As a result, the transmitted light intensity of the laser light L transmitted through the packaging bag H can be electrically processed.
　測定部１１は、透過光強度に係る透過光信号と、発信器１から発振されたレーザー光Ｌの入射光強度に係る入射光信号に基づいて透過率を計算し、当該透過率に基づいてレーザー光の特定ガスによる吸光度を求め、当該吸光度に基づいて包装袋Ｈ内の特定ガスの濃度を測定するように構成されている。 The measuring unit 11 calculates the transmittance based on the transmitted light signal related to the transmitted light intensity and the incident light signal related to the incident light intensity of the laser light L emitted from the oscillator 1, and measures the laser beam based on the transmittance. The absorbance of light by the specific gas is obtained, and the concentration of the specific gas in the packaging bag H is measured based on the absorbance.
　そして、本発明の包装袋のガス濃度測定装置被包装物Ｇは、レーザー発生部２の先端部とレーザー受光部４の先端部のいずれもが、包装袋Ｈの片面（表面Ｈａ）側に対向配置されている。これにより、包装袋のガス濃度測定を包装袋Ｈの片面（表面Ｈａ）側のみで行うことができるため、測定する包装袋Ｈ毎に、レーザー発光部２の先端部およびレーザー受光部４の先端部を往復動機構により移動させて包装袋Ｈの表裏面（Ｈａ，Ｈｂ）に接近させる必要がなく包装時間を短縮できると共に、包装袋Ｈの厚みに左右されることなく包装袋Ｈ内のガス濃度を測定でき、包装袋Ｈの厚みに対応させてレーザー発光部２の先端部とレーザー受光部４の先端部の離隔距離を調整する必要もない。 In the gas concentration measuring apparatus for packaging bag G of the present invention, both the tip of the laser generating unit 2 and the tip of the laser receiving unit 4 are opposed to one side (surface Ha) of the packaging bag H. are placed. As a result, since the gas concentration measurement of the packaging bag H can be performed only on one side (surface Ha) of the packaging bag H, the tip of the laser emitting unit 2 and the tip of the laser receiving unit 4 can be measured for each packaging bag H to be measured. It is not necessary to move the part by a reciprocating mechanism to approach the front and back surfaces (Ha, Hb) of the packaging bag H, so that the packaging time can be shortened, and the gas in the packaging bag H can be released without being affected by the thickness of the packaging bag H. The concentration can be measured, and there is no need to adjust the separation distance between the tip of the laser emitting part 2 and the tip of the laser receiving part 4 corresponding to the thickness of the packaging bag H.
　レーザー発生部２およびレーザー受光部４は、先端部に包装袋Ｈを吸着可能な吸盤部６，７をそれぞれ有している。これにより、レーザー発光部２の先端やレーザー受光部４の先端と被測定物（包装袋Ｈ）との密着性を確保できると共に、包装袋Ｈ内に十分な検知空間を確保して測定精度が向上させることができる。 The laser generating part 2 and the laser receiving part 4 have suction cup parts 6 and 7 capable of sucking the packaging bag H at their tips, respectively. As a result, the adhesion between the tip of the laser emitting part 2 and the tip of the laser receiving part 4 and the object to be measured (packaging bag H) can be secured, and a sufficient detection space can be secured in the packaging bag H to improve the measurement accuracy. can be improved.
　具体的には、レーザー発生部２およびレーザー受光部４は、図１または図２に示すように、鏡筒部８，１２の先端部に包装袋Ｈを吸着可能な吸盤部６，７をそれぞれ有している。これらの吸盤部６，７は、鏡筒部８，１２に設けられた吸引穴１３，１４を備えた連通路１５，１６に流量調整弁（図示しない）や圧力計（図示しない）を介して真空ポンプ等の真空源（図示しない）が取り付けられてそれぞれ吸引可能に構成されている。 Specifically, as shown in FIG. 1 or 2, the laser generating unit 2 and the laser receiving unit 4 have suction cups 6 and 7 that can suck the packaging bag H at the tip portions of the lens barrels 8 and 12, respectively. have. These suction cup portions 6 and 7 are connected to communicating passages 15 and 16 having suction holes 13 and 14 provided in lens barrel portions 8 and 12 via flow control valves (not shown) and pressure gauges (not shown). A vacuum source (not shown) such as a vacuum pump is attached to each of them so that they can be sucked.
　なお、この実施例のレーザー式ガス濃度計５は、連通路１５，１６とレーザー経路１７，１８とがそれぞれ連通し、吸盤部６，７による吸引により、レーザー発光部２とレーザー受光部４のレーザー経路１７，１８内も真空雰囲気下となるように構成されている。これにより、レーザー経路１７，１８内の残存酸素率をほぼ０％として測定精度をより高めることができる。 In the laser type gas concentration meter 5 of this embodiment, the communicating passages 15 and 16 and the laser paths 17 and 18 communicate with each other, and the suction by the suction cup portions 6 and 7 causes the laser light emitting portion 2 and the laser light receiving portion 4 to move. The insides of the laser paths 17 and 18 are also configured to be in a vacuum atmosphere. As a result, the residual oxygen rate in the laser paths 17 and 18 can be set to approximately 0%, and the measurement accuracy can be further improved.
　また、この実施例のレーザー式ガス濃度計５は、吸盤部６，７が、厚さ方向を上下に配置された包装袋Ｈに対して斜め上方から包装袋Ｈを吸引するように配されている。これにより、包装袋Ｈの膨らみに対応して、吸盤部６，７をより被測定物（包装袋）Ｈに密着させることができると共に、包装袋Ｈ内に十分な検知空間を確保して測定精度が向上させることができる。 Further, in the laser type gas concentration meter 5 of this embodiment, the suction cup portions 6 and 7 are arranged so as to suck the packaging bag H from obliquely above the packaging bag H arranged vertically in the thickness direction. there is As a result, the suction cup portions 6 and 7 can be brought into closer contact with the object to be measured (packaging bag) H in response to the bulge of the packaging bag H, and a sufficient detection space is secured within the packaging bag H for measurement. Accuracy can be improved.
　具体的には、この実施例の吸盤部６，７は、図３（ａ）中、中心線ｎに対して線対称の位置に設けられている。すなわち、この実施例の吸盤部６，７は、包装袋Ｈの中央を縦断し垂直方向に延在する中心線ｎに対して、同一角度で、かつ同一高さの位置に配されている。これにより、レーザー発光部２とレーザー受光部４間における包装袋Ｈの測定距離Ｗが一定に保持されるように構成されている。 Specifically, the suction cup portions 6 and 7 of this embodiment are provided at positions symmetrical with respect to the center line n in FIG. 3(a). That is, the suction cups 6 and 7 of this embodiment are arranged at the same angle and at the same height with respect to the center line n that extends vertically through the center of the packaging bag H. As shown in FIG. As a result, the measurement distance W of the packaging bag H between the laser emitting unit 2 and the laser receiving unit 4 is maintained constant.
　レーザー発生部２の先端に設けられた吸盤部６は、発信器１から発振されるレーザー光Ｌを屈折させて受信器３に受光させるレンズ１９を有している。これにより、発信器１から発振されるレーザー光Ｌを屈折させて受信器３との光軸を調整し、レーザー光Ｌを受信器３に確実に受光させることができる。 The suction cup portion 6 provided at the tip of the laser generating portion 2 has a lens 19 that refracts the laser light L emitted from the transmitter 1 and causes the receiver 3 to receive the light. Thereby, the laser light L oscillated from the transmitter 1 is refracted to adjust the optical axis with the receiver 3 , so that the laser light L can be reliably received by the receiver 3 .
　吸盤部６，７は、袋ガイド板２０，２１をそれぞれ有している。これにより、吸盤部６，７の吸引に伴って袋ガイド板２０に沿った形状に包装袋Ｈを変形させることで包装袋Ｈ内に十分な検知空間を確保して測定精度が向上させることができる。 The suction cup portions 6 and 7 have bag guide plates 20 and 21, respectively. As a result, the packaging bag H is deformed along the bag guide plate 20 by the suction of the suction cups 6 and 7, thereby securing a sufficient detection space in the packaging bag H and improving the measurement accuracy. can.
　具体的には、この実施例の袋ガイド板２０，２１は、図３に示すように、矩形の板状体にて構成されており、袋ガイド板２０，２１の中央付近には、円形の貫通穴２２，２３がそれぞれ設けられ、吸盤部６，７の先端側に設けられた細径部２４，２５を貫通穴２２，２３内にそれぞれ位置させて装着することで、吸盤部６，７の先端部に袋ガイド板２０，２１が取り付けられている。また、袋ガイド板２０，２１は、吸盤部６，７または鏡筒部８，１２の軸方向に直交する方向に延在するよう配されている。そして、吸盤部６，７の吸引に伴い、袋ガイド板２０，２１の内側面２０ａ，２１ｂに沿って包装袋Ｈが引張されることにより、包装袋Ｈ内に十分な検知空間が確保されるように構成されている。 Specifically, as shown in FIG. 3, the bag guide plates 20 and 21 of this embodiment are formed of rectangular plate-like bodies, and near the center of the bag guide plates 20 and 21, a circular Through holes 22 and 23 are provided, respectively, and small- diameter portions 24 and 25 provided on the tip side of the suction cup portions 6 and 7 are positioned in the through holes 22 and 23, respectively. Bag guide plates 20 and 21 are attached to the ends of the . Moreover, the bag guide plates 20 and 21 are arranged to extend in a direction perpendicular to the axial direction of the suction cup portions 6 and 7 or the barrel portions 8 and 12 . As the suction cups 6 and 7 are sucked, the packaging bag H is pulled along the inner side surfaces 20a and 21b of the bag guide plates 20 and 21, thereby ensuring a sufficient detection space within the packaging bag H. is configured as
　また、この実施例の包装袋のガス濃度測定装置Ｇは、図１に示すように、包装袋Ｈを載置するための包装袋載置部２６と、包装袋載置部２６を往復動するための載置部往復動機構（例えばシリンダーやサーボモーター等）２７を有している。これにより、順次測定する被包装物Ｓを包装した包装袋Ｈを、設定位置に配置されたレーザー発光部２の先端部とレーザー受光部４の先端部に接近または離隔させることができる。 As shown in FIG. 1, the packaging bag gas concentration measuring device G of this embodiment reciprocates between a packaging bag placing portion 26 on which the packaging bag H is placed and the packaging bag placing portion 26. It has a receiver reciprocating mechanism (for example, a cylinder, a servomotor, etc.) 27 for this purpose. As a result, the packaging bag H in which the objects S to be packaged are sequentially measured can be brought closer to or away from the tip of the laser emitting unit 2 and the tip of the laser receiving unit 4 arranged at the set position.
　つぎに、図４ないし図８に示した本発明の包装袋のガス濃度測定装置の他の実施例について説明する。
　この実施例の包装袋のガス濃度測定装置Ｇ１は、被包装物Ｓを充填しガス置換して包装された包装袋Ｈ内の特定ガスの濃度を測定する包装袋のガス濃度測定装置であって、特定波長のレーザー光Ｌを照射する発信器３１を有するレーザー発生部３２と、発信器３１から発振されるレーザー光Ｌを受光する受信器３３を有するレーザー受光部３４とを備えたレーザー式ガス濃度計３５を有し、レーザー発生部３２の先端部３６とレーザー受光部３４の先端部３７のいずれもが、包装袋Ｈの片面（表面Ｈａ）側に対向配置されている。以下、各構成について順次詳述する。 Next, another embodiment of the gas concentration measuring apparatus for packaging bags according to the present invention shown in FIGS. 4 to 8 will be described.
A packaging bag gas concentration measuring device G1 of this embodiment is a packaging bag gas concentration measuring device for measuring the concentration of a specific gas in a packaging bag H filled with an item S to be packaged, replaced with gas, and packaged. , a laser generator 32 having a transmitter 31 for irradiating a laser beam L of a specific wavelength, and a laser receiver 34 having a receiver 33 for receiving the laser beam L oscillated from the transmitter 31. It has a densitometer 35, and both the tip 36 of the laser generator 32 and the tip 37 of the laser receiver 34 are arranged on one side (surface Ha) of the packaging bag H so as to face each other. Each configuration will be described in detail below.
　この実施例のガス濃度測定装置Ｇ１も、窒素、二酸化炭素等の不活性ガスによりガス置換をして包装された包装袋Ｈ内の特定ガスである酸素濃度をレーザー式ガス濃度計５によって測定するものであり、単独の測定装置として使用され、または、ロータリー式包装機、トラック式包装機、製袋包装機等の各種包装機内の検査工程に設置して包装機内の一装置として使用され、さらに、ロータリー式包装機、トラック式包装機、製袋包装機等の各種包装機のアウトラインに設けられたコンベア式検査工程に設置して使用される。 The gas concentration measuring device G1 of this embodiment also measures the concentration of oxygen, which is a specific gas, in the packaging bag H packaged after gas replacement with an inert gas such as nitrogen or carbon dioxide, by means of the laser type gas concentration meter 5. It is used as a single measuring device, or installed in the inspection process in various packaging machines such as rotary packaging machines, truck packaging machines, bag making packaging machines, etc. , rotary packaging machines, truck packaging machines, bag-making packaging machines, and other packaging machines.
　なお、この実施例のガス濃度測定装置Ｇ１は、各種包装機のアウトラインに設けられたコンベア式検査工程に設置され、図４または図５に示すように、コンベアベルトＢ上に配されて図４中、手前側から奥側に向かって順次に搬送される、ガス置換をして包装された包装袋Ｈのガス濃度を順次測定する装置である。 The gas concentration measuring device G1 of this embodiment is installed in a conveyor type inspection process provided in the outline of various packaging machines, and is arranged on a conveyor belt B as shown in FIG. 4 or FIG. This is an apparatus for sequentially measuring the gas concentration of packaging bags H which are packed after gas replacement and which are sequentially conveyed from the front side to the back side.
　レーザー式ガス濃度計３５は、特定波長のレーザー光Ｌを照射する発信器３１を有するレーザー発生部３２と、発信器３１から発振されるレーザー光Ｌを受光する受信器３３を有するレーザー受光部３４とを備えており、レーザー発生部３２とレーザー受光部３４とが包装袋Ｈの両側に対向して配されるように構成されている。この実施例では、レーザー発生部３２とレーザー受光部３４は、コンベアベルトＢの幅方向の両側にそれぞれ配置されている。 The laser type gas concentration meter 35 includes a laser generator 32 having a transmitter 31 for emitting a laser beam L of a specific wavelength, and a laser receiver 34 having a receiver 33 for receiving the laser beam L oscillated from the transmitter 31. , and the laser generator 32 and the laser receiver 34 are arranged on both sides of the packaging bag H so as to face each other. In this embodiment, the laser generating section 32 and the laser receiving section 34 are arranged on both sides of the conveyor belt B in the width direction.
　レーザー式ガス濃度計３５は、半導体レーザーを光源とする赤外線吸収分光法を利用するもので、測定対象の分子（測定ガス：この実施例では酸素ガス）に固有周波数の光を与えると光エネルギーを吸収し、それを測定することによりガス濃度の表示を行なうものである。 The laser type gas concentration meter 35 utilizes infrared absorption spectroscopy using a semiconductor laser as a light source. It absorbs and measures it to indicate the gas concentration.
　具体的には、レーザー発生部３２の発信器３１から発振されるレーザー光Ｌは、レーザー発生部３２の先端部３６内を通過して包装袋Ｈ内に侵入し、レーザー受光部３４の受信器３３に受光されるように構成されている。発信器３１から発振される特定波長のレーザー光Ｌは、酸素ガスの場合、波長（固有周波数）７６０～７７０ｎｍの範囲から選択される。そして、特定波長のレーザー光Ｌが、包装袋Ｈ内に残留している酸素ガスによって吸収されると、レーザー受光部３４の受信器３３に受光されたレーザー光の吸光度に基づいて包装体Ｈ内に残留している酸素ガスのガス濃度が測定されるように構成されている。 Specifically, the laser beam L emitted from the transmitter 31 of the laser generator 32 passes through the tip 36 of the laser generator 32, enters the packaging bag H, and reaches the receiver of the laser receiver 34. 33 is configured to receive the light. The laser light L of a specific wavelength oscillated from the oscillator 31 is selected from the wavelength (natural frequency) range of 760 to 770 nm in the case of oxygen gas. Then, when the laser light L of the specific wavelength is absorbed by the oxygen gas remaining in the packaging bag H, the laser light received by the receiver 33 of the laser light receiving unit 34 absorbs light within the package H based on the absorbance of the laser light. is configured to measure the gas concentration of oxygen gas remaining in the
　レーザー発生部３２は、発信器３１から発振されるレーザー光Ｌの波長を特定の波長に設定し、所定の光強度に調整する制御部４０を有している。制御部４０は、半導体レーザー素子（図示しない）から出力されるレーザー光Ｌの波長を測定対象の特定ガス固有の特定波長に調整して、レーザー光Ｌが所定の入射光強度で射出されるように増幅制御する。 The laser generator 32 has a controller 40 that sets the wavelength of the laser light L emitted from the oscillator 31 to a specific wavelength and adjusts the light intensity to a predetermined level. The control unit 40 adjusts the wavelength of the laser light L output from a semiconductor laser element (not shown) to a specific wavelength specific to the specific gas to be measured so that the laser light L is emitted with a predetermined incident light intensity. to control amplification.
　レーザー受光部３４は、包装袋Ｈを透過したレーザー光Ｌを受光する受信器３３と、受信器３３からの受光信号に基づいてガス濃度を測定する測定部４１とを有している。 The laser light receiving unit 34 has a receiver 33 that receives the laser light L that has passed through the packaging bag H, and a measuring unit 41 that measures the gas concentration based on the received light signal from the receiver 33 .
　受信器３３は、包装袋Ｈを透過したレーザー光Ｌの透過光強度を電気的な透過光信号に変換する素子、例えばフォトダイオード（図示略）を有している。これによって、包装袋Ｈを透過したレーザー光Ｌの透過光強度を電気的に処理することができる。 The receiver 33 has an element such as a photodiode (not shown) that converts the transmitted light intensity of the laser light L transmitted through the packaging bag H into an electrical transmitted light signal. As a result, the transmitted light intensity of the laser light L transmitted through the packaging bag H can be electrically processed.
　測定部４１は、透過光強度に係る透過光信号と、発信器３１から発振されたレーザー光Ｌの入射光強度に係る入射光信号に基づいて透過率を計算し、当該透過率に基づいてレーザー光の特定ガスによる吸光度を求め、当該吸光度に基づいて包装袋Ｈ内の特定ガスの濃度を測定するように構成されている。 The measurement unit 41 calculates the transmittance based on the transmitted light signal related to the transmitted light intensity and the incident light signal related to the incident light intensity of the laser light L oscillated from the oscillator 31, and measures the laser beam based on the transmittance. The absorbance of light by the specific gas is obtained, and the concentration of the specific gas in the packaging bag H is measured based on the absorbance.
　本発明のガス濃度測定装置は、レーザー発生部の先端部とレーザー受光部の先端部の少なくとも一方に、包装袋を吸着可能とする吸着機構を有している。この実施例のガス濃度測定装置Ｇ１は、レーザー発生部３２の先端部３６とレーザー受光部３４の先端部３７の双方に、包装袋Ｈを吸着可能とする吸着機構４２、４３を有している。これにより、レーザー発生部３２の先端部３６とレーザー受光部３４の先端部３７と被測定物（包装袋Ｈ）との密着性を確保できると共に、包装袋Ｈ内に十分な検知空間を確保して測定精度を向上させることができる。 The gas concentration measuring device of the present invention has an adsorption mechanism that can adsorb a packaging bag on at least one of the tip of the laser generator and the tip of the laser receiver. The gas concentration measuring apparatus G1 of this embodiment has suction mechanisms 42 and 43 that can suck the packaging bag H at both the tip portion 36 of the laser generating portion 32 and the tip portion 37 of the laser receiving portion 34. . As a result, the adhesion between the tip 36 of the laser generator 32, the tip 37 of the laser receiver 34, and the object to be measured (packaging bag H) can be ensured, and a sufficient detection space can be secured within the packaging bag H. can improve measurement accuracy.
　具体的には、レーザー発生部３２の先端部３６およびレーザー受光部３４の先端部３７は、図４または図５に示すように、吸引穴４４，４５を備えた連通路４６，４７に流量調整弁（図示しない）や圧力計（図示しない）を介して真空ポンプ等の真空源（図示しない）が取り付けられてそれぞれ吸引可能な吸着機構４２，４３をそれぞれ有している。 Specifically, the distal end portion 36 of the laser generating portion 32 and the distal end portion 37 of the laser receiving portion 34 are connected to communication paths 46 and 47 having suction holes 44 and 45 as shown in FIGS. Vacuum sources (not shown) such as vacuum pumps are attached via valves (not shown) and pressure gauges (not shown), and have suction mechanisms 42 and 43 capable of suction.
　なお、この実施例のレーザー式ガス濃度計３５は、連通路４６，４７とレーザー経路４８，４９とがそれぞれ連通し、吸着機構４２，４３による吸引により、レーザー発光部３２とレーザー受光部３４のレーザー経路４８，４９内も真空雰囲気下となるように構成されている。これにより、レーザー経路４８，４９内の残存酸素率をほぼ０％として測定精度をより高めることができる。 In the laser type gas concentration meter 35 of this embodiment, the communication paths 46 and 47 and the laser paths 48 and 49 are communicated with each other, and suction by the adsorption mechanisms 42 and 43 causes the laser light emitting portion 32 and the laser light receiving portion 34 to move. The insides of the laser paths 48 and 49 are also configured to be in a vacuum atmosphere. As a result, the residual oxygen rate in the laser paths 48 and 49 can be set to approximately 0%, and the measurement accuracy can be further improved.
　レーザー発生部３２の先端部３６の先端面５０およびレーザー受光部３４の先端部３７の先端面５１は、図５または図６に示すように、正面（図５中、手前側から奥側に向かう方向）視において、それぞれ上側が内側（包装袋Ｈ側）に位置し下側が外側（制御部４０，測定部４１側）に位置する傾斜面に形成されている。これにより、コンベアベルトＢ上に、厚さ方向を上下に配された包装袋Ｈの膨らみに対応してレーザー発生部３２およびレーザー受光部３４の先端面５０，５１を包装袋Ｈに密着させることができると共に、包装袋内に十分な検知空間を確保して測定精度を向上させることができる。 As shown in FIG. 5 or FIG. 6, the tip end face 50 of the tip end portion 36 of the laser generating portion 32 and the tip end face 51 of the tip end portion 37 of the laser receiving portion 34 face the front face (in FIG. direction), the upper side is positioned on the inner side (packaging bag H side) and the lower side is positioned on the outer side (control section 40 and measurement section 41 side). As a result, the leading end surfaces 50 and 51 of the laser generating section 32 and the laser receiving section 34 are brought into close contact with the packaging bag H, corresponding to the bulge of the packaging bag H arranged vertically on the conveyor belt B in the thickness direction. In addition, a sufficient detection space can be secured in the packaging bag to improve the measurement accuracy.
　そして、本発明の包装袋のガス濃度測定装置被包装物Ｇ１も、レーザー発生部３２の先端部３６とレーザー受光部３４の先端部３７のいずれもが、包装袋Ｈの片面（表面Ｈａ）側に対向配置されている。これにより、包装袋のガス濃度測定を包装袋Ｈの片面（表面Ｈａ）側のみで行うことができるため、測定する包装袋Ｈ毎に、レーザー発光部３２の先端部３６およびレーザー受光部３４の先端部３７を往復動機構により移動させて包装袋Ｈの表裏面（Ｈａ，Ｈｂ）に接近させる必要がなく包装時間を短縮できると共に、包装袋Ｈの厚みに左右されることなく包装袋Ｈ内のガス濃度を測定でき、包装袋Ｈの厚みに対応させてレーザー発光部３２の先端部３６とレーザー受光部３４の先端部３７の離隔距離を調整する必要もない。 In the gas concentration measuring apparatus for packaging bag G1 of the present invention, both the tip 36 of the laser generating unit 32 and the tip 37 of the laser receiving unit 34 are located on one side (surface Ha) of the packaging bag H. is placed opposite to As a result, the gas concentration measurement of the packaging bag H can be performed only on one side (surface Ha) of the packaging bag H. It is not necessary to move the tip part 37 by a reciprocating mechanism to approach the front and back surfaces (Ha, Hb) of the packaging bag H, so that the packaging time can be shortened, and the inside of the packaging bag H is not affected by the thickness of the packaging bag H. , and there is no need to adjust the separation distance between the tip 36 of the laser emitting part 32 and the tip 37 of the laser receiving part 34 corresponding to the thickness of the packaging bag H.
　レーザー発生部３２の先端部３６およびレーザー受光部３４の先端部３７には、袋当接用ガイド板３９がそれぞれ設けられている。これにより、レーザー発光部３２の先端部３６およびレーザー受光部３４の先端部３７と被測定物（包装袋）Ｈとの密着性が確保されると共に、包装袋Ｈ内に十分な検知空間を確保して測定精度を向上させることができる。すなわち、吸引機構４２，４３による吸引に伴って袋当接用ガイド板３９に沿った形状に包装袋Ｈを変形させることで包装袋Ｈ内に十分な検知空間を確保して測定精度を向上させることができる。 A bag contacting guide plate 39 is provided at the tip 36 of the laser generator 32 and the tip 37 of the laser receiver 34, respectively. As a result, the adhesion between the tip portion 36 of the laser emitting portion 32 and the tip portion 37 of the laser receiving portion 34 and the object to be measured (packaging bag) H is secured, and a sufficient detection space is secured within the packaging bag H. can be used to improve measurement accuracy. That is, by deforming the packaging bag H along the bag-contacting guide plate 39 with the suction by the suction mechanisms 42 and 43, a sufficient detection space is secured in the packaging bag H to improve the measurement accuracy. be able to.
　具体的には、この実施例の袋当接用ガイド板３９は、図４に示すように、傾斜面に形成された、レーザー発生部３２の先端部３６の先端面５０およびレーザー受光部３４の先端部３７の先端面５１の内側（包装袋Ｈ側）に、それぞれ傾斜して配されている。 Specifically, as shown in FIG. 4, the guide plate 39 for contacting with the bag of this embodiment has a tip end face 50 of the tip end portion 36 of the laser generating portion 32 and a tip end face 50 of the laser light receiving portion 34 formed on an inclined plane. They are arranged on the inner side of the tip surface 51 of the tip portion 37 (on the side of the packaging bag H) so as to be inclined.
　袋当接用ガイド板３９は、図７に示すように、屈曲された板状体にて構成されており、レーザー発生部３２の先端部３６の先端面５０およびレーザー受光部３４の先端部３７の先端面５１に面当接して配される傾斜面部３９ａと、レーザー発生部３２の先端部３６およびレーザー受光部３４の先端部３７の外側後方部に袋当接用ガイド板３９をそれぞれ固定するための固定用屈曲部３９ｂと、傾斜面部３９ａの中央付近に設けられたレーザー光通過用貫通穴３９ｃと、固定用屈曲部３９ｂに設けられた固定用ボルト挿通穴３９ｄを有している。 As shown in FIG. 7, the guide plate 39 for contacting with the bag is formed of a bent plate-like body, and has a front end surface 50 of the front end portion 36 of the laser generating portion 32 and a front end portion 37 of the laser light receiving portion 34. A bag contacting guide plate 39 is fixed to the outer rear portion of the tip portion 36 of the laser generating portion 32 and the tip portion 37 of the laser receiving portion 34, respectively. a fixing bent portion 39b, a laser beam passing through hole 39c provided near the center of the inclined surface portion 39a, and a fixing bolt insertion hole 39d provided in the fixed bent portion 39b.
　往復動機構３８は、レーザー発生部３２の先端部３６およびレーザー受光部３４の先端部３７を、包装袋Ｈに対して内外に往復動させるための機構である。これにより、包装袋Ｈのサイズに応じてレーザー発生部３２の先端およびレーザー受光部３４の先端の離隔距離を一定距離に設定することができ、レーザー発光部３２の先端やレーザー受光部３４の先端と被測定物（包装袋）との密着性を確保できる。 The reciprocating mechanism 38 is a mechanism for reciprocating the distal end portion 36 of the laser generating portion 32 and the distal end portion 37 of the laser receiving portion 34 in and out of the packaging bag H. As a result, the separation distance between the tip of the laser generating section 32 and the tip of the laser receiving section 34 can be set to a constant distance according to the size of the packaging bag H, and the tip of the laser emitting section 32 and the tip of the laser receiving section 34 can be set at a constant distance. and the object to be measured (packaging bag) can be ensured.
　具体的には、この実施例の往復動機構３８は、図８に示すように、レーザー発生部３２を固定した第１往復動部３８ａと、レーザー受光部３４を固定した第２往復動部３８ｂと、第１往復動部３８ａと第２往復動部３８ｂとをそれぞれ往復動可能に取り付けた送りねじ機構３８ｃと、送りねじ機構３８ｃを操作するための操作部３８ｄとを有し、操作部３８ｄを正逆回転させることにより、レーザー発生部３２とレーザー受光部３４が相対的に内外に移動してレーザー発生部３２の先端およびレーザー受光部３４の先端の間隔を設定可能に構成されている。 Specifically, as shown in FIG. 8, the reciprocating mechanism 38 of this embodiment includes a first reciprocating portion 38a to which the laser generating portion 32 is fixed and a second reciprocating portion 38b to which the laser light receiving portion 34 is fixed. , a feed screw mechanism 38c in which a first reciprocating part 38a and a second reciprocating part 38b are attached so as to be reciprocable, and an operation part 38d for operating the feed screw mechanism 38c. , the laser generating section 32 and the laser receiving section 34 are relatively moved inwards and outwards, so that the distance between the tip of the laser generating section 32 and the tip of the laser receiving section 34 can be set.
　なお、この実施例の往復動機構３８は、操作部３８ｄが手動であるが、これに限定されるものではなく、レーザー発生部とレーザー受光部間は、包装袋Ｈのサイズに応じて自動的に接近及び離隔して設定可能に構成された往復動機構も本発明の範疇に包含される。具体的には、レーザー発生部とレーザー受光部をそれぞれ、シリンダーやサーボモーターなどにより包装袋Ｈに対して内外に移動可能に構成する。 In the reciprocating mechanism 38 of this embodiment, the operation portion 38d is manually operated, but the operation portion 38d is not limited to this. The scope of the present invention also includes a reciprocating mechanism that can be set to approach and separate from. Specifically, the laser generating section and the laser receiving section are configured to be movable in and out of the packaging bag H by a cylinder, a servomotor, or the like.
　さらに、図９に示した本発明の包装袋のガス濃度測定装置の他の実施例について説明する。
　この実施例の包装袋のガス濃度測定装置Ｇ２と前述した包装袋のガス濃度測定装置Ｇ１との基本的な相違は、包装袋のガス濃度測定装置Ｇ２が、レーザー発生部３２の先端部３６およびレーザー受光部３４の先端部３７を昇降させるための昇降用往復動機構（例えばシリンダーやサーボモーター等）を有している点である。これにより、順次搬送されて来る包装袋Ｈに対して、レーザー発生部３２の先端部３６およびレーザー受光部３４の先端部３７を接近または離隔させることができるよう構成されている。 Further, another embodiment of the gas concentration measuring device for packaging bags according to the present invention shown in FIG. 9 will be described.
The basic difference between the packaging bag gas concentration measuring device G2 of this embodiment and the packaging bag gas concentration measuring device G1 described above is that the packaging bag gas concentration measuring device G2 includes the tip portion 36 of the laser generating section 32 and the The difference is that it has an elevating reciprocating mechanism (for example, a cylinder, a servomotor, etc.) for elevating the tip 37 of the laser light receiving section 34 . As a result, the front end portion 36 of the laser generating portion 32 and the front end portion 37 of the laser light receiving portion 34 can be moved toward or away from the packaging bags H that are successively conveyed.
　つぎに、本発明の包装袋のガス濃度測定方法について説明する。
　本発明の包装袋のガス濃度測定方法は、前述した包装袋のガス濃度測定装置Ｇ，Ｇ１，Ｇ２に共通して使用されているガス濃度測定方法であり、例えば、ガス濃度測定装置Ｇで説明すると、図１に示すように、特定波長のレーザー光Ｌを照射する発信器１を有するレーザー発生部２と、発信器１から発振されるレーザー光Ｌを受光する受信器３を有するレーザー受光部４とを備えたレーザー式ガス濃度計５を有する包装袋のガス濃度測定装置を用いて被包装物Ｓを充填しガス置換して包装された包装袋Ｈ内の特定ガスの濃度を測定する包装袋のガス濃度測定方法であって、レーザー発生部２の先端部およびレーザー受光部４の先端部を、包装袋Ｈの片面（Ｈｂ）側に対向配置させてガス濃度を測定する包装袋のガス濃度測定方法である。これにより、測定する包装袋毎に、レーザー発光部の先端部およびレーザー受光部の先端部を往復動機構により移動させて包装袋の表裏面に接近させる必要がなく包装時間を短縮できると共に、包装袋の厚みに左右されることなく包装袋のガス濃度を測定でき、包装袋の厚みに対応させてレーザー発光部の先端部とレーザー受光部の先端部の離隔距離を調整する必要もない。 Next, the gas concentration measuring method of the packaging bag of the present invention will be explained.
The gas concentration measuring method for packaging bags of the present invention is a gas concentration measuring method commonly used in the gas concentration measuring devices G, G1, and G2 for packaging bags described above. Then, as shown in FIG. 1, a laser generator 2 having a transmitter 1 for emitting a laser beam L of a specific wavelength and a laser receiver 3 having a receiver 3 for receiving the laser beam L oscillated from the transmitter 1 Package for measuring the concentration of a specific gas in a packaging bag H filled with a package S and gas replacement using a packaging bag gas concentration measuring device having a laser type gas concentration meter 5 equipped with 4. A method for measuring the gas concentration of a bag, in which the tip of the laser generating unit 2 and the tip of the laser receiving unit 4 are placed facing each other on one side (Hb) of the packaging bag H to measure the gas concentration. It is a concentration measurement method. As a result, it is not necessary to move the tip of the laser emitting portion and the tip of the laser receiving portion by the reciprocating mechanism to approach the front and back surfaces of the packaging bag for each packaging bag to be measured, and the packaging time can be shortened. The gas concentration of the packaging bag can be measured without being influenced by the thickness of the bag, and there is no need to adjust the distance between the tip of the laser emitting part and the tip of the laser receiving part corresponding to the thickness of the packaging bag.
Ｇ，Ｇ１，Ｇ２　包装袋のガス濃度測定装置
Ｓ　　　　　　　被包装物
Ｈ　　　　　　　包装袋
Ｈａ　　　　　　表面
Ｈｂ　　　　　　裏面
１　　　　　　　発信器
２　　　　　　　レーザー発生部
３　　　　　　　受信器
４　　　　　　　レーザー受光部
５　　　　　　　レーザー式ガス濃度計
６，７　　　　　吸盤部
８　　　　　　　鏡筒部
９　　　　　　　制御部
１０　　　　　　受光ケーブル
１１　　　　　　測定部
１２　　　　　　鏡筒部
１３，１４　　　吸引穴
１５，１６　　　連通路
１８　　　　　　レーザー経路
１９　　　　　　レンズ
２０，２１　　　袋ガイド板
２０ａ，２１ａ　内側面
２２，２３　　　貫通穴
２４，２５　　　細径部
２６　　　　　　包装袋載置部
２７　　　　　　載置部往復動機構
３１　　　　　　発信器
３２　　　　　　レーザー発生部
３３　　　　　　受信器
３４　　　　　　レーザー受光部
３５　　　　　　レーザー式ガス濃度計
３６　　　　　　レーザー発生部の先端部
３７　　　　　　レーザー受光部の先端部
３８　　　　　　往復動機構
３９　　　　　　袋当接用ガイド板
３９ａ　　　　　傾斜面部
３９ｂ　　　　　固定用屈曲部
３９ｃ　　　　　レーザー光通過用貫通穴
４０　　　　　　制御部
４１　　　　　　測定部
４２，４３　　　吸着機構
４４，４５　　　吸引穴
４６，４７　　　連通路
４８，４９　　　レーザー経路
５０，５１　　　先端面
５５　　　　　　昇降用往復動機構 G, G1, G2 Packaging bag gas concentration measuring device S Object to be packaged H Packaging bag Ha Front surface Hb Back surface 1 Transmitter 2 Laser generating unit 3 Receiver 4 Laser light receiving unit 5 Laser type gas concentration meter 6, 7 Suction cup unit 8 Mirror Cylindrical part 9 Control part 10 Light receiving cable 11 Measuring part 12 Lens barrel parts 13, 14 Suction holes 15, 16 Communication path 18 Laser path 19 Lenses 20, 21 Bag guide plates 20a, 21a Inner surfaces 22, 23 Through holes 24, 25 Thin Radial portion 26 Packaging bag mounting portion 27 Mounting portion reciprocating mechanism 31 Transmitter 32 Laser generating portion 33 Receiver 34 Laser receiving portion 35 Laser gas densitometer 36 Tip portion 37 of laser generating portion Tip portion 38 of laser receiving portion Reciprocating mechanism 39 Bag contact guide plate 39a Slanted surface portion 39b Fixing bent portion 39c Through hole 40 for laser light passage Control portion 41 Measurement portions 42, 43 Suction mechanisms 44, 45 Suction holes 46, 47 Communication passages 48, 49 Laser Paths 50, 51 Tip surface 55 Lifting reciprocating mechanism

Claims (12)

  1. 被包装物を充填しガス置換して包装された包装袋内の特定ガスの濃度を測定する包装袋のガス濃度測定装置であって、特定波長のレーザー光を照射する発信器を有するレーザー発生部と、前記発信器から発振されるレーザー光を受光する受信器を有するレーザー受光部とを備えたレーザー式ガス濃度計を有し、前記レーザー発生部の先端部と前記レーザー受光部の先端部のいずれもが、前記包装袋の片面側に対向配置されていることを特徴とする包装袋のガス濃度測定装置。 A gas concentration measuring device for a packaging bag that measures the concentration of a specific gas in a packaging bag filled with an object to be packaged and replaced with gas, and which has a laser generator having a transmitter that emits a laser beam of a specific wavelength. and a laser light-receiving part having a receiver for receiving the laser beam oscillated from the transmitter. A gas concentration measuring device for a packaging bag, characterized in that both are arranged opposite to one side of the packaging bag.
  2. 前記レーザー発生部の先端部および前記レーザー受光部の先端部は、前記包装袋を吸着可能な吸盤部を有している請求項１に記載の包装袋のガス濃度測定装置。 2. The gas concentration measuring device for a packaging bag according to claim 1, wherein the tip of the laser generator and the tip of the laser receiver have suction cups capable of sucking the packaging bag.
  3. 前記吸盤部は、袋ガイド板を有している請求項１または２に記載の包装袋のガス濃度測定装置。 3. The gas concentration measuring device for a packaging bag according to claim 1, wherein the suction cup portion has a bag guide plate.
  4. 前記吸盤部は、厚さ方向を上下に配置された包装袋に対して斜め上方から前記包装袋を吸引するように配されている請求項１ないし３のいずれかに記載の包装袋のガス濃度測定装置。 4. The gas concentration of the packaging bag according to any one of claims 1 to 3, wherein the suction cup portion is arranged so as to suck the packaging bag from an obliquely upper side with respect to the packaging bag arranged vertically in the thickness direction. measuring device.
  5. 前記レーザー発生部の先端に設けられた吸盤部は、前記発信器から発振されるレーザー光を屈折させて前記受信器に受光させるレンズを有している請求項１ないし４のいずれかに記載の包装袋のガス濃度測定装置。 5. The suction cup part provided at the tip of the laser generating part has a lens that refracts the laser light emitted from the transmitter and causes the receiver to receive the laser light. Gas concentration measuring device for packaging bags.
  6. 前記包装袋のガス濃度測定装置は、前記包装袋を載置するための包装袋載置部と、前記包装袋載置部を往復動するための載置部往復動機構を有している請求項１ないし５のいずれかに記載の包装袋のガス濃度測定装置。 The gas concentration measuring device for a packaging bag has a packaging bag placement section for placing the packaging bag thereon, and a placement section reciprocating mechanism for reciprocating the packaging bag placement section. Item 6. A gas concentration measuring device for a packaging bag according to any one of items 1 to 5.
  7. 前記レーザー発生部および前記レーザー受光部は、先端部に袋当接用ガイド板を有している請求項１に記載の包装袋のガス濃度測定装置。 2. The gas concentration measuring device for a packaging bag according to claim 1, wherein said laser generating section and said laser receiving section have a guide plate for contacting the bag at the tip thereof.
  8. 前記レーザー発生部および前記レーザー受光部の先端面は、正面視において上側が内側に位置し下側が外側に位置する傾斜面に形成され、該傾斜面に前記袋当接用ガイドが傾斜して配されている請求項７に記載の包装袋のガス濃度測定装置。 The distal end surfaces of the laser generating section and the laser receiving section are formed on an inclined surface with the upper side positioned inside and the lower side positioned outside in a front view, and the bag contact guide is inclined on the inclined surface. 8. The gas concentration measuring device for packaging bags according to claim 7.
  9. 前記ガス濃度測定装置は、前記レーザー発生部の先端部と前記レーザー受光部の先端部の少なくとも一方に、前記包装袋を吸着可能とする吸着機構を有している請求項７または８に記載の包装袋のガス濃度測定装置。 9. The gas concentration measuring device according to claim 7, wherein at least one of the tip of the laser generating section and the tip of the laser receiving section has a suction mechanism capable of sucking the packaging bag. Gas concentration measuring device for packaging bags.
  10. 前記ガス濃度測定装置は、前記レーザー発生部の先端部および前記レーザー受光部の先端部を前記包装袋に対して内外に往復動させて前記レーザー発生部の先端部と前記レーザー受光部の先端部間の離隔距離を設定するための往復動機構を有している請求項７ないし９のいずれかに記載の包装袋のガス濃度測定装置。 The gas concentration measuring device reciprocates the distal end portion of the laser generating portion and the distal end portion of the laser receiving portion inwardly and outwardly with respect to the packaging bag, thereby 10. The gas concentration measuring device for packaging bags according to any one of claims 7 to 9, further comprising a reciprocating mechanism for setting the separation distance between the packaging bags.
  11. 前記包装袋のガス濃度測定装置は、前記レーザー発生部の先端部と前記レーザー受光部の先端部を昇降させるための昇降用往復動機構を有している請求項７ない１０のいずれかに記載の包装袋のガス濃度測定装置。 11. The packaging bag gas concentration measuring device according to any one of claims 7 to 10, further comprising a lifting and lowering reciprocating mechanism for lifting and lowering the tip of the laser generator and the tip of the laser receiver. gas concentration measuring device for packaging bags.
  12. 特定波長のレーザー光を照射する発信器を有するレーザー発生部と、前記発信器から発振されるレーザー光を受光する受信器を有するレーザー受光部とを備えたレーザー式ガス濃度計を有する包装袋のガス濃度測定装置を用いて被包装物を充填しガス置換して包装された包装袋内の特定ガスの濃度を測定する包装袋のガス濃度測定方法であって、前記レーザー発生部の先端部および前記レーザー受光部の先端部を、前記包装袋の片面側に対向配置させてガス濃度を測定することを特徴とする包装袋のガス濃度測定方法。 A packaging bag having a laser gas densitometer, comprising a laser generator having a transmitter for irradiating a laser beam of a specific wavelength, and a laser receiver having a receiver for receiving the laser beam oscillated from the transmitter. A gas concentration measuring method for a packaging bag, which measures the concentration of a specific gas in a packaging bag filled with an object to be packaged and replaced with gas using a gas concentration measuring device, the method comprising: A method for measuring the gas concentration of a packaging bag, wherein the tip portion of the laser light receiving portion is arranged to face one side of the packaging bag, and the gas concentration is measured.
PCT/JP2022/019762 2021-05-17 2022-05-10 Device for measuring gas concentration in packaging bag and method for measuring gas concentration in packaging bag WO2022244648A1 (en)

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JP2010107197A (en) * 2008-10-28 2010-05-13 General Packer Co Ltd Instrument for measuring concentration of gas in packaging bag
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